Can I build a deck together with friends on TCGSwap?

Yes. Every deck on TCGSwap has a Collaboration Space. You can invite up to 5 friends; they can suggest card changes, discuss ideas, and playtest proposals. You review and apply suggestions before anything changes in your deck.

How does deck collaboration work?

It works like a pull request for your deck. Collaborators open the deck editor, make their proposed changes, and submit a suggestion with a note. You get notified, open the comparison view to see exactly what they changed, and choose to apply all, cherry-pick individual cards, or decline. Nothing changes in your deck until you approve it.

Can collaborators chat and discuss the deck?

Yes. The Collaboration Space has a shared group discussion thread for the whole deck, plus a per-suggestion Q&A thread for each proposal. You can @mention teammates and link specific cards inline.

Is collaborative deck building free?

Yes, collaboration is free for all TCGSwap users during beta. You can invite up to 5 collaborators per deck.

Does TCGSwap work for MTG, Pokémon, Yu-Gi-Oh and One Piece collaboration?

Yes. The Collaboration Space supports all four games — Magic: The Gathering, Pokémon TCG, Yu-Gi-Oh and One Piece. Format validation and card prices are included for each game.

Number 23: Lancelot, Dark Knight of the Underworld · Yu-Gi-Oh! ZEXAL Volume 7 promotional card 66547759/1

Number 23: Lancelot, Dark Knight of the Underworld (Yu-Gi-Oh! ZEXAL Volume 7 promotional card 66547759/1), Ultra Rare. Market price $3.48, up 2.4% this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

2 Level 8 monsters This card can attack your opponent directly while it has Xyz Material. When this card inflicts battle damage to your opponent: You can target 1 face-up monster your opponent controls; destroy it. Once per turn, during either player's turn, when a Spell/Trap Card, or another monster's effect, is activated: Detach 1 Xyz Material from this card; negate the activation.

Weekly price history

Week	Market price
2026-W31	$3.06
2026-W32	$3.13
2026-W33	$3.39
2026-W34	$3.49
2026-W35	$3.49
2026-W36	$3.54
2026-W37	$3.45
2026-W38	$3.40
2026-W39	$3.48

Questions

How much is Number 23: Lancelot, Dark Knight of the Underworld 66547759/1 worth?

Number 23: Lancelot, Dark Knight of the Underworld from Yu-Gi-Oh! ZEXAL Volume 7 promotional card (66547759/1) has a market estimate of $3.48, up 2.4% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Number 23: Lancelot, Dark Knight of the Underworld 66547759/1 rare?

It is an Ultra Rare from Yu-Gi-Oh! ZEXAL Volume 7 promotional card, a 1-card set.

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