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.

Sidney · Fusion Strike 279/264

Sidney (Fusion Strike 279/264), Secret Rare. Market price €5.58, up 2.6% this week. Illustrated by Hideki Ishikawa. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Card text

Your opponent reveals their hand. Discard up to 2 in any combination of Pokémon Tool cards, Special Energy cards, and Stadium cards from it.

Weekly price history

Week	Market price
2026-W31	€4.94
2026-W32	€4.92
2026-W33	€4.92
2026-W34	€5.29
2026-W35	€5.29
2026-W36	€5.36
2026-W37	€5.37
2026-W38	€5.44
2026-W39	€5.58

Printings & variants

Holo — $3.61

Questions

How much is Sidney 279/264 worth?

Sidney from Fusion Strike (279/264) has a market estimate of €5.58, up 2.6% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Sidney 279/264 rare?

It is a Secret Rare from Fusion Strike, a 264-card set.

Is Sidney 279/264 tournament legal?

Sidney 279/264 is legal in Expanded.

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