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.

Cosmog · Cosmic Eclipse 99/236

Cosmog (Cosmic Eclipse 99/236), Common, Basic, 50 HP. Market price €0.10, down 9.1% this week. Illustrated by Mizue. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Even though its helpless, gaseous body can be blown away by the slightest breeze, it doesn't seem to care.

Card text

Ascension — Search your deck for a card that evolves from this Pokémon and put it onto this Pokémon to evolve it. Then, shuffle your deck.

Weekly price history

Week	Market price
2026-W31	€0.11
2026-W32	€0.12
2026-W33	€0.12
2026-W34	€0.12
2026-W35	€0.12
2026-W36	€0.11
2026-W37	€0.11
2026-W38	€0.11
2026-W39	€0.10

Printings & variants

Normal — $0.30

Questions

How much is Cosmog 99/236 worth?

Cosmog from Cosmic Eclipse (99/236) has a market estimate of €0.10, down 9.1% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Cosmog 99/236 rare?

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

Is Cosmog 99/236 tournament legal?

Cosmog 99/236 is legal in Expanded.

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