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.

Spy-C-Spy · Duelist Alliance: Deluxe Edition 21088856/7

Spy-C-Spy (Duelist Alliance: Deluxe Edition 21088856/7), Short Print. Market price $0.13, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

If this card is Normal Summoned: Look at 1 random card in your opponent's Extra Deck, and if it has 2000 or more ATK, this card gains 1000 ATK. If it has less than 2000 ATK, you gain LP equal to that monster's ATK.

Weekly price history

Week	Market price
2026-W31	$0.16
2026-W32	$0.16
2026-W33	$0.15
2026-W34	$0.14
2026-W35	$0.14
2026-W36	$0.14
2026-W37	$0.14
2026-W38	$0.13
2026-W39	$0.13

Questions

How much is Spy-C-Spy 21088856/7 worth?

Spy-C-Spy from Duelist Alliance: Deluxe Edition (21088856/7) has a market estimate of $0.13, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Spy-C-Spy 21088856/7 rare?

It is a Short Print from Duelist Alliance: Deluxe Edition, a 7-card set.

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