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 · SM Black Star Promos SM42/248

Cosmog (SM Black Star Promos SM42/248), Promo, Basic, 60 HP. Market price €0.47, unchanged this week. Illustrated by Megumi Mizutani. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Its body is gaseous and frail. It slowly grows as it collects dust from the atmosphere.

Cosmog (National Pokédex #789) first appeared in Pokémon Sun and Moon (2016). Its earliest English cards in our catalogue are from 2017: McDonald's Collection 2017, SM Black Star Promos, Sun & Moon.

More Cosmog printings

Card text

Dust Gathering — Draw a card.

Weekly price history

Week	Market price
2026-W36	€0.44
2026-W37	€0.46
2026-W38	€0.49
2026-W39	€0.47
2026-W40	€0.47

Price in context

Cosmog ranks #248 of the 248 priced cards in SM Black Star Promos. The median Promo in the set is €9.17. The 248 priced cards in SM Black Star Promos are worth €7244.85 together; this card is less than 0.1% of that. The set’s value is unchanged this week.