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.

Muk · Undaunted 31/90

Muk (Undaunted 31/90), Uncommon, Stage1, 100 HP. Market price €0.39, up 8.3% this week. Illustrated by Midori Harada. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Its body is made of a powerful poison. Touching it accidentally will cause a fever that requires bed rest.

Card text

Sludge Drag — Switch the Defending Pokémon with 1 of your opponent's Benched Pokémon. The new Defending Pokémon is now Confused and Poisoned.
Pester 50+ — If the Defending Pokémon is affected by a Special Condition, this attack does 50 damage plus 30 more damage.

Weekly price history

Week	Market price
2026-W31	€0.28
2026-W32	€0.30
2026-W33	€0.30
2026-W34	€0.30
2026-W35	€0.29
2026-W36	€0.29
2026-W37	€0.26
2026-W38	€0.36
2026-W39	€0.39

Printings & variants

Normal — $0.62
Reverse Holo — $6.38

Questions

How much is Muk 31/90 worth?

Muk from Undaunted (31/90) has a market estimate of €0.39, up 8.3% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Muk 31/90 rare?

It is an Uncommon from Undaunted, a 90-card set.

Is Muk 31/90 tournament legal?

Muk 31/90 has rotated out of the current formats.

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