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.

Mimighoul Dungeon · The Infinite Forbidden 86809440/101

Mimighoul Dungeon (The Infinite Forbidden 86809440/101), Quarter Century Secret Rare. Market price $1.21, up 1.7% this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

"Mimighoul" monsters you control that were not Normal or Special Summoned this turn gain ATK equal to their original DEF. Any player who controls a face-down monster cannot Normal Summon monsters, nor declare an attack with monsters that were Special Summoned this turn. During your Main Phase: You can add 1 "Mimighoul" monster from your Deck or GY to your hand. You can only use this effect of "Mimighoul Dungeon" once per turn.

Weekly price history

Week	Market price
2026-W31	$1.36
2026-W32	$1.31
2026-W33	$1.42
2026-W34	$1.41
2026-W35	$1.41
2026-W36	$1.19
2026-W37	$1.21

Questions

How much is Mimighoul Dungeon 86809440/101 worth?

Mimighoul Dungeon from The Infinite Forbidden (86809440/101) has a market estimate of $1.21, up 1.7% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Mimighoul Dungeon 86809440/101 rare?

It is a Quarter Century Secret Rare from The Infinite Forbidden, a 101-card set.

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