+ Create an Xyz Monster +

[Draconus297]

Doppelknight Archfiend
DARK - Rank 4 - Fiend/Xyz/Effect - 2000/0
2 Level 4 Fiend monsters
If a DARK Link monster that either player controls is destroyed by battle or your opponent's card effect: You can Special Summon that destroyed monster, then, immediately after this effect resolves; Xyz Summon, using that monster as Xyz Material. You can only Summon 1 "Doppelknight Archfiend" per turn this way. Once per turn, if you control "Pandemonium" or "Archfiend Palabyrinth" and a monster is Normal Summoned, you can detach 1 Xyz Material from this card (Quick Effect): Target 1 face-up DARK Fiend monster you control; Special Summon 1 monster from your hand, Deck, or Graveyard with the same original name as the target. If this card destroys your opponent's monster by battle: Attach the destroyed monster to this card as Xyz Material. This card is unaffected by the effects of monsters of the same Type (Fusion, Ritual, Synchro, Xyz, Pendulum, or Link) as its Xyz Materials.

1) Rank 3 Rock
2) In the vein of Hope Magician, combine a ZeXal or later character with their counterpart in another series (say, a D/D/D Borrel)
3) Create a Delta-Numerix for a Numerix that lacks one (check the Generics thread), or a Number C for a Number that lacks one.
4)

[Flash Flyer - Sakura]

Number 133: Comet Serpent Effigy
Rank 3 | FIRE | Rock | Xyz | Effect
2100 | 200
3 Level 3 monsters
Cannot be destroyed by card effects while it has material. Once per turn: You can detach 1 material from this card; inflict 300 damage for each Rock monster you control. If this card destroys an opponent's monster by battle: You can attach it to this card as material.

As far as the interpretation goes, 火巳山 can be read hi-mi-za(n), which is its Number read in goroawase; translated to "fire snake mountain". It's also why this card is a FIRE Rock to an extent.

====
1. Make another Number.
2. "X-Acceleranimal" monster
3. "Sky Striker" Xyz (totally not ripping off SlackerMagician)
4. Xyz that can use Links as material.
5. Beast Xyz
6. Make a Number C, S or F form of an existing Number, except Number 39

Pick one, though you may be able to do multiple themes at once if you know how to do it.

[Draconus297]

Number C11: All-Seeing Eye
DARK - Rank 8 - Spellcaster/Xyz/Effect - 3200/2500
3 Level 8 monsters
If "Number 11: Big Eye" you control is destroyed by your opponent's monster (by battle or effect): You can Special Summon that destroyed monster, then Xyz Summon this card, using that "Number 11: Big Eye" as Material. While this card has a Spellcaster monster as Xyz Material, if this card destroys your opponent's monster by battle: You can Special Summon that destroyed monster to your field in face-up Defense Position. Once per turn, you can Tribute 1 monster you control that is owned by your opponent (Quick Effect): Destroy all monsters your opponent controls with ATK less than or equal to the Tributed monster's. While this card has "Number 11: Big Eye" as Material, it gains the following effects:
●This card cannot be destroyed or targeted by card effects, except the effects of "Number" Xyz monsters.
●Once per turn, you can detach 1 Xyz Material from this card (Quick Effect): Target 1 Special Summoned monster your opponent controls; take control of it.

1) Give an anime character not from Heartland (nobody from ZeXal or Xyz Dimension) an Xyz monster.
2) Create a Delta-Numerix or Number C for any appropriate Numerix or Number lacking one.
3) Create an Xyz monster capable of recuperating its own Xyz Material.

[Flash Flyer - Sakura]

Number C8: Heraldic Emperor Genom-Heritage Helix
Rank 5 | LIGHT | Psychic | Xyz | Effect
2900/2000
3 Level 5 monsters
If this card would be destroyed by battle or card effect, you can detach 1 material from this card instead. If this card has "Number 8: Heraldic King Genom-Heritage" as material, it gains this effect.
● Once per turn (Quick Effect): You can target 1 monster your opponent controls; this card's name becomes that monster's name, also replace this effect with that monster's original effect until the End Phase, then that monster's ATK/DEF become 0 and its effects are negated.

(Also a note that anything related to shit that non-Pendulum Xyz Monsters cannot do is still copyable, but can't be used for obvious reasons.)

====
1. "@AGM" Xyz
2. Make another Number.
3. "X-Acceleranimal" monster
4. "Sky Striker" Xyz (totally not ripping off SlackerMagician)
5. Beast Xyz
6. Give any 5Ds character of your choice an Xyz

[Draconus297]

Phantom Id @AGM
WIND - Rank 2 - Winged Beast/Xyz/Effect - 1100/1500
2 Level 2 "AGM" monsters
When this card is Xyz Summoned: You can add 1 "Archetype" Spell/Trap Card from your Graveyard to your hand. While this card has an "@AGM" monster attached as Material, double its original ATK. Once per turn, you can detach 1 Xyz Material from this card to target a number of face-up cards your opponent controls, up to the number of face-up "Archetype" Spell/Trap Cards you control: Return that target(s) to their original owner's hands. You can only activate each of the following effects of "Phantom Id @AGM" once per turn:
●If this card is sent from the field to the Graveyard: You can Special Summon 1 Level 3 or lower "AGM" monster from your Graveyard.
●If an "AGM" Xyz monster you own is destroyed while this card is already in your Graveyard: You can Special Summon this card from your Graveyard, then attach up to 1 each of an "AGM" Fusion, Ritual, Synchro, Xyz, and/or Link monster from your Graveyard to this card as Xyz Material.

1) Give any anime character that didn't live in Heartland an Xyz monster.
2) Create an Xyz monster capable of recuperating its own Xyz Material.
3) Create an Xyz monster that works like Utopia Double, either setting up a combo for a specific Xyz monster, or making that other monster easier to Summon (say, if that other Xyz was a 3-mat or something).

[Flash Flyer - Sakura]

Number 139: Samsara Wyvern
Rank 4 | WIND | Dragon | Xyz | Effect
2400 | 1500
3+ Level 4 monsters
Gains 200 ATK for each material attached to it. Once per turn (Quick Effect): You can detach 1 material from this card; this turn, cards sent from the hand or field to the GY are shuffled into the Deck instead. Cards or effects cannot be activated in response to this effect's activation. During the End Phase, if this card has no materials on it: You can pay 800 LP; attach 1 card from your Deck to this card as material.

(For flavor stuff, the 9 can be read as "kyu" as in the one for absorption, 3 for materials and I guess the whole thing can be read as a circular reference to 360. Besides the Number, the ATK/DEF/Rank are all factors of 360 degrees)

====
1. Xyz Monster with an alternative summon condition that involves using a non-Xyz Monster as material.
2. Make another Number.
3. "X-Acceleranimal" monster
4. "Sky Striker" Xyz (totally not ripping off SlackerMagician)
5. Beast Xyz
6. Give any 5Ds character of your choice an Xyz

(Options 1 and 4 can be done together given how the Deck works, but honestly, it's still up to you)

[Draconus297]

Number 201: D.D. Uncrowned King
DARK - Rank 2 - Warrior/Xyz/Effect - 1000/1800
2 Level 2 monsters
If a monster you control with 1800 original ATK is destroyed: You can Special Summon that card from your Graveyard, then, immediately after this effect resolves; Xyz Summon this card, using that Summoned monster as Material. If this card is Xyz Summoned: Attach as many Normal Spell Cards as possible with different names from both Graveyards to this card as Material. This card gains 200 ATK, and one additional attack on a monster during your Battle Phase, for each Xyz Material attached to it. If this card destroys your opponent's monster by battle: Attach the destroyed monster to this card as Xyz Material. If this card would leave the field, except by being destroyed, detach 1 Xyz Material from this card, instead (if it would have been Tributed or used as Material for a Summon, that Summon is negated). If this face-up card on the field is destroyed, and you control no other monsters: Banish all monsters that were attached to this card; Special Summon this card, and if you do, it becomes your opponent's End Phase, also this card gains ATK equal to the combined ATK of each player's banished monster with the highest ATK. You can only activate this effect of "Number 201: D.D. Uncrowned King" once per Duel.

Go ahead and scheme how exactly you intend to actually use this thing's effect, but it fulfills conditions 1 and 2 simultaneously.

1) Create a Number C form of Matisyahu over here.
2) Give any non-Heartland anime character (so that disqualifies most ZeXal characters and everyone from Arc-V's Xyz Dimension) a Rank-wielding toy.
3) Create an Xyz that acts like Utopia Double for an old or bad Xyz monster; making it either easier to Summon, or giving it a combo to actually use its effect to its fullest.

[Flash Flyer - Sakura]

Well, I'm not doing one for VRAINS people, so...that goes down to the other 3 that don't focus on Xyz sans ARC-V.

Morphtronic Power Striper (no, I did not intentionally misspell "stripper" b/c someone's going to be triggered if I used that word)
Rank 4 | EARTH | Machine | Xyz | Effect
2000 | 2000
2+ Level 4 monsters
Once per turn, you can Xyz Summon "Morphtronic Power Striper" by using a non-Xyz "Morphtronic" monster as material. Once per turn: You can attach 1 "Morphtronic" card from your hand or GY to this card as material.
● While in Attack Position: Gains 200 ATK for each material it has. Once per turn: You can detach 1 material from this card; destroy cards on the field, up to the number of "Morphtronic" or "Power Tool" monsters you control.
● While in Defense Position: Gains 200 DEF for each material it has. Cannot be destroyed by battle or card effects while it has material.

Rua was much easier to design for than his sister.

====
1. Holiday themed Xyz
2. Xyz for any archetype that doesn't have one.
3. Can use a Link Monster as material akin to Dingirsu

[The Nepfessor]

Mistletoe Wyvern
Rank 4 WATER Wyrm/Xyz/Effect
2500/1200
2 Level 4 Wyrm monsters
You can detach 1 material from this card, then target 1 face-up monster your opponent controls; banish that target, and if you do, your opponent chooses 1 monster from their Deck with a lower ATK than the banished monster, and they Special Summon that monster to their field in Attack Position. You can only use this effect of "Mistletoe Wyvern" once per turn.

Fun trivia: Its ATK and DEF refer to the date of Christmas: 25th of December.

N/Cs:

1. Xyz for any archetype that doesn't have one.
2. Can use a Link Monster as material akin to Dingirsu
3. Benefit from having a Synchro Monster underneath it (for cards like "Black and White Wave")

[Flash Flyer - Sakura]

(Just to note that option 1 when I gave it didn't specify it having to be within the game; your own customs and even group archs are fair game.)

Also inb4 I cheat with Rangikouru for Diver Deer in option 2. (Seriously though, I won't)

====
Skystorm Mecha Ship - Egglander II
Rank 4 | WIND | Machine | Xyz | Effect
2200/2600
2+ Level 4 WIND Machine monsters
Once per turn, you can also Xyz Summon "Skystorm Mecha - Egglander II" by using 1 "Skystorm Mecha" Link Monster you control as material. Once per turn: You can detach any number of materials from this card; banish an equal number of cards from your opponent's hand. During the End Phase, if this card has no material: You can attach 1 "Skystorm Mecha" monster in your GY to it as material.

(Named after the Egg Fort 2 from Sonic X, which I literally based the entire archetype on. You won't see this on dA because obvious Sega property and shit. Also in the event you cannot ladder climb or get Extra Linked, you now have a backup plan, given new rules.)

====
1. Can use Link Monster as material like Dingirsu
2. "Sky Striker" Xyz (totally not ripping off SlackerMagician)
3. Dragon Xyz

[The Nepfessor]

Sky Striker Ace - Bofu
Rank 4 WIND Machine/Xyz/Effect
1500/1500
2 Level 4 monsters
You can only Special Summon "Sky Striker Ace - Bofu" once per turn. This card can attack directly. After damage calculation, if this card battled: You can detach 1 material from this card; Set 1 "Sky Striker" Spell directly from your Deck.

(I made for Hayate; if you wanted to do for Kagari, Shizuku or even Kaina, let me know).

I want to see an Xyz Monster that, like Dingirsu, can use a Link Monster as material.

[Flash Flyer - Sakura]

Part of me wants to post Rangikouru, but that would be cheating. (I also already did this prompt for Skystorms in previous post.)

World Legacy Guardragon Astramarduke
Rank 9 | WIND | Dragon | Xyz | Effect
3500/2600
3 Level 9 monsters
You can only Special Summon "World Legacy Guardragon Astramarduke(s)" once per turn. You can also Xyz Summon this card by using an "World Chalice", "Crusadia" or "Guardragon" Link Monster you control as material. While this card has material, it gains these effects.
● Your opponent cannot target this card with card effects, also their monsters cannot target monsters for attacks, except this one.
● Once per turn, if your opponent Summons a monster(s) (Quick Effect): You can negate the Summon, and if you do, banish that card.
If this card is destroyed by an opponent's effect and sent to the GY: You can Special Summon it, and if you do, attach 1 monster from your GY to it as material.

(Guardragon grew up again.)

====
1. King of Feral Imp / Gallant Granite for another Type of your choosing. (Doesn't have to be Rank 4)
2. Xyz for any archetype that doesn't have one.
3. Variable effects based on its material count.

[The Nepfessor]

Deadalus Mirror Serpent
Rank 3 WATER Sea Serpent/Xyz/Effect
1800/1600
2 Level 3 monsters
You can detach 1 material from this card, then activate 1 of these effects;
● Add 1 Sea Serpent monster from your Deck to your hand.
● Activate 1 "Umi" from your hand, Deck, or GY.
You can only use this effect of "Deadalus Mirror Serpent" once per turn.

Banifish era...

N/C: Make a brother/sister card for Leviair, the Sea Dragon, that is WATER and supports Banifish strategies.

[Draconus297]

Floacean, the Basin Dragon
WATER - Rank 3 - Sea Serpent/Xyz/Effect - 0/2200
2 Level 3 monsters
While this card is in Defense Position, it is unaffected by your opponent's card effects. If a Fish, Aqua, or Sea Serpent monster is banished from your field: Increase this card's ATK by 500, and its DEF by 300. If a Fish, Aqua, or Sea Serpent monster you control inflicts battle damage to your opponent: You can attach 1 card from your opponent's Graveyard, or a face-up Spell/Trap Card they control, to this card as Xyz Material. Once per turn, you can detach 1 Xyz Material from this card (Quick Effect): Target 3 of your banished Fish, Sea Serpent, or Aqua monsters; Special Summon the first target, add the second target to your hand, and shuffle the third target into your Deck, then draw 1 card.

1. Give any old/bad Xyz monster the Utopia Double treatment.
2. Create an Xyz monster for any pure Synchro/Fusion/Ritual strategy (that is, just that Summoning mechanic in-archetype) that did not come from the anime (Duel Terminal, TCG originals, AGM archetypes, etc.)
3. Create an Xyz monster that can be Summoned as a "stack" on top of a specific, named non-Xyz monster (ie, "You can Xyz Summon this card using 1 "Cave Dragon" you control as Xyz Material.")
3.

[Flash Flyer - Sakura]

(I would rip off the ZPD Accel officers for option 3, but I won't. Seriously, you know what they do.)

Life Stream Accel Dragon
Rank 8 | EARTH | Dragon | Xyz | Effect
2900/2400
2 Level 8 Dragon monsters, including a Synchro Monster
You can also Xyz Summon this card by using 1 "Life Stream Dragon" you control as material. You take no damage while you control this Xyz Summoned card. Once per turn: You can detach 1 material from this card; activate 1 of these effects.
● Special Summon 1 Level 10 or lower Dragon Synchro Monster from your Extra Deck, ignoring Summoning conditions.
● Special Summon 2 Dragon Synchro Monsters with different names from your GY.
If this card would be destroyed: You can banish 1 Spell from your GY instead.

====
1. Requires 2 or more Xyz Monsters to summon it.
2. Xyz for any archetype that doesn't have one.
3. Variable effects based on its material count.

[The Nepfessor]

Sniperrokket Dragon
Rank 4 DARK Dragon/Xyz/Effect
2100/1600
2 Level 4 Dragon monsters
When a Link Monster's effect is activated that targets this face-up card on the field (Quick Effect): You can destroy this card, then send 1 random card from your opponent's hand to the GY. You can detach 2 materials from this card, then target 1 Link-3 or lower DARK Dragon monster in your GY; Special Summon that target. You can only use each effect of "Sniperrokket Dragon" once per turn.

Technically Revolver has an Xyz (but that's part of the Borrel family, this is more Rokket-designed, as shown by its first effect).

N/C: Variable effects based on its material count.

[Draconus297]

Ytun, Veteran of 8 Million Battles
EARTH - Rank 3 - Rock/Xyz/Effect - 1500/2200
2 or more Level 3 EARTH monsters
If this card destroys your opponent's monster by battle: Attach the destroyed monster to this card as Xyz Material. This card gains 200 ATK for each attached Xyz Material. This card gains the following effects while it has the appropriate number of attached Materials:
●1+: During each of your opponent's End Phases: Detach 1 Xyz Material from this card, and reduce the ATK of all face-up monsters your opponent controls by 500. If your opponent controls no face-up monsters during their End Phase, inflict 500 damage to your opponent instead.
●2+: If this is the only Attack Position monster you control, it can attack all monsters your opponent controls, once each.
●3+: This card is unaffected by other monster effects, also it cannot be targeted by card effects.
●4+: An opponent's monster that battles this card has its effects negated.
●5+: If your opponent adds a card(s) from their Deck or Graveyard to their hand by a card's effect: This card gains 100 ATK, then, if this card has the highest ATK among monsters on the field, your opponent loses 100 LP each time they activate a card or effect, or Summon a monster, from their hand for the rest of the turn (even if this card leaves the field).

Yes, ladies and gentlemen, that last effect stacks. Each search, draw, or recovery compounds the HP loss per effect activated from hand, meaning that your average opponent, searching three times in the course of making a combo, will be on very low LP if you made a 5-mat Ytun the previous turn.

1. Give any old/bad Xyz thes Utopia Double treatment.
2. Create an Xyz for a Deck that has no Xyz or Links, and that did not appear in the anime.
3. Create an Xyz that makes people scramble for a Rank 6 engine.

[The Nepfessor]

Number 17: Leviathan Stream Dragon
Rank 3 WATER Dragon/Xyz/Effect
0/2000
2 Level 3 monsters
(Quick Effect): You can detach 1 material from this card; send 1 Level 4 or lower WATER monster from your Deck to the GY, then Special Summon from your Extra Deck, 1 "Number 17: Leviathan Dragon", by using this face-up card you control as material, and if you do, it gains 1000 ATK, but it cannot be destroyed by battle this turn. You can only use this effect of "Number 17: Leviathan Stream Dragon" once per turn.

Leviathan Dragon has a sentimential value for me.

Now, give a Rank 6 Bounzer Xyz Monster.

[Flash Flyer - Sakura]

I mean, we already got Strike Bounzer, but he might need some backup in case the mokes act up again.

Riot Bounzer
Rank 6 | EARTH | Warrior | Xyz | Effect
2400 | 3000
2 Level 6 monsters
While this card has material, "Bounzer" monsters you control cannot be destroyed by battle or card effects. Once per turn, when a card or effect is activated (Quick Effect): Detach 1 material from this card; negate the activation, and if you do, destroy it.

Yeah, this should do it.

====
1. Requires 2 or more Xyz Monsters to summon it.
2. Requires Ritual Monsters for materials.
3. Variable effects based on its material count.

[Draconus297]

Chaos King Nightmare Leviathan
DARK - Rank 0 - Sea Serpent/Xyz/Effect - ?/?
2 or more Xyz monsters with different original Ranks
This card's Rank is equal to the number of its attached Materials. This card's original ATK/DEF are equal to the combined respective ATK/DEF of its Xyz monster Materials. While this card has Xyz Material, it gains the effects of all its Materials whose Rank is less than or equal to its own. Once per turn, you can target 1 face-up monster on the field whose Level, Rank, or Link Rating is less than or equal to this card's current Rank: Attach that target to this card as Xyz Material.

1) Create an Xyz for any non-anime archetype without Xyz or Links.
2) Create a competitively viable Rank 6.
3) Create a FIRE Rank 7.