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.

Tandemaus · Paldean Fates 209/91

Tandemaus (Paldean Fates 209/91), Shiny rare, Basic, 30 HP. Market price €15.44, down 4.1% this week. Illustrated by Lee HyunJung. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Exhibiting great teamwork, they use their incisors to cut pieces out of any material that might be useful for a nest, then make off with them.

Weekly price history

Week	Market price
2026-W31	€17.83
2026-W32	€17.48
2026-W33	€17.76
2026-W34	€17.31
2026-W35	€17.33
2026-W36	€16.10
2026-W37	€15.44

Printings & variants

Holo — $29.36

Questions

How much is Tandemaus 209/91 worth?

Tandemaus from Paldean Fates (209/91) has a market estimate of €15.44, down 4.1% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Tandemaus 209/91 rare?

It is a Shiny rare from Paldean Fates, a 91-card set.

Is Tandemaus 209/91 tournament legal?

Tandemaus 209/91 is legal in Expanded.

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