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.

Finneon · Mysterious Treasures 83/123

Finneon (Mysterious Treasures 83/123), Common, Basic, 50 HP. Market price €0.13, down 7.1% this week. Illustrated by Ken Sugimori. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

After long exposure to sunlight, the patterns on its tail fins shine vividly when darkness arrives.

Card text

Elegant Swim — Flip a coin. If heads, prevent all effects of an attack, including damage, done to Finneon during your opponent's next turn.
Tackle 20

Weekly price history

Week	Market price
2026-W31	€0.23
2026-W32	€0.22
2026-W33	€0.22
2026-W34	€0.20
2026-W35	€0.20
2026-W36	€0.16
2026-W37	€0.14
2026-W38	€0.14
2026-W39	€0.13

Printings & variants

Normal — $0.33
Reverse Holo — $0.94

Questions

How much is Finneon 83/123 worth?

Finneon from Mysterious Treasures (83/123) has a market estimate of €0.13, down 7.1% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Finneon 83/123 rare?

It is a Common from Mysterious Treasures, a 123-card set.

Is Finneon 83/123 tournament legal?

Finneon 83/123 has rotated out of the current formats.

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