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.

Cosmoem · Cosmic Eclipse 101/236

Cosmoem (Cosmic Eclipse 101/236), Uncommon, Stage1, 90 HP. Market price €0.11, down 8.3% this week. Illustrated by Aya Kusube. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

The king who ruled Alola in times of antiquity called it the "cocoon of the stars" and built an altar to worship it.

Card text

Stiffen — During your opponent’s next turn, this Pokémon takes 40 less damage from attacks (after applying Weakness and Resistance).

Weekly price history

Week	Market price
2026-W31	€0.14
2026-W32	€0.15
2026-W33	€0.15
2026-W34	€0.13
2026-W35	€0.13
2026-W36	€0.12
2026-W37	€0.11
2026-W38	€0.12
2026-W39	€0.11

Printings & variants

Normal — $0.31

Questions

How much is Cosmoem 101/236 worth?

Cosmoem from Cosmic Eclipse (101/236) has a market estimate of €0.11, down 8.3% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Cosmoem 101/236 rare?

It is an Uncommon from Cosmic Eclipse, a 236-card set.

Is Cosmoem 101/236 tournament legal?

Cosmoem 101/236 is legal in Expanded.

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