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.

Mathmech Sigma · Mystic Fighters 27182739/60

Mathmech Sigma (Mystic Fighters 27182739/60), Super Rare. Market price $0.32, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

If you control no monsters in the Extra Monster Zone, while this card is in your hand or GY: You can Special Summon this card, but banish it when it leaves the field, also you cannot Special Summon monsters from the Extra Deck for the rest of this turn, except Cyberse monsters. You can only use this effect of "Mathmech Sigma" once per turn. If this card you control is used as Synchro Material for a "Mathmech" monster, you can treat it as a non-Tuner.

Weekly price history

Week	Market price
2026-W31	$0.27
2026-W32	$0.28
2026-W33	$0.30
2026-W34	$0.31
2026-W35	$0.31
2026-W36	$0.32
2026-W37	$0.32
2026-W38	$0.32
2026-W39	$0.32

Questions

How much is Mathmech Sigma 27182739/60 worth?

Mathmech Sigma from Mystic Fighters (27182739/60) has a market estimate of $0.32, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Mathmech Sigma 27182739/60 rare?

It is a Super Rare from Mystic Fighters, a 60-card set.

Browse more Yu-Gi-Oh cards · All Mystic Fighters cards · Build a deck · Track your collection