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.

Marshmao☆Yummy · Doom of Dimensions 10966439/101

Marshmao☆Yummy (Doom of Dimensions 10966439/101), Secret Rare. Market price $26.62, up 13.8% this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

If you control no monsters, or all monsters you control are LIGHT Beast monsters: You can Special Summon this card from your hand. If this card is Normal or Special Summoned: You can add 1 "Yummy" Spell/Trap from your GY to your hand, or, if this card was Special Summoned by the effect of a Synchro Monster, you can place 1 "Yummy" Field Spell or 1 "Yummy" Continuous Spell/Trap from your Deck or banishment, face-up on your field instead. You can only use each effect of "Marshmao☆Yummy" once per turn.

Weekly price history

Week	Market price
2026-W31	$16.29
2026-W32	$18.13
2026-W33	$20.38
2026-W34	$21.58
2026-W35	$21.58
2026-W36	$23.39
2026-W37	$26.62

Questions

How much is Marshmao☆Yummy 10966439/101 worth?

Marshmao☆Yummy from Doom of Dimensions (10966439/101) has a market estimate of $26.62, up 13.8% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Marshmao☆Yummy 10966439/101 rare?

It is a Secret Rare from Doom of Dimensions, a 101-card set.

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