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.

Mind Castlin · 25th Anniversary Tin: Dueling Mirrors 12172567/398

Mind Castlin (25th Anniversary Tin: Dueling Mirrors 12172567/398), Prismatic Secret Rare. Market price $2.36, up 6.8% this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

1 Tuner + 1+ non-Tuner monsters You can target 1 face-up monster your opponent controls; switch control of that monster and this card. If this Synchro Summoned card is sent to the GY: You can target 1 face-up monster on each field; switch control of those monsters. You can only use each effect of "Mind Castlin" once per turn.

Weekly price history

Week	Market price
2026-W31	$2.25
2026-W32	$2.37
2026-W33	$2.30
2026-W34	$2.33
2026-W35	$2.33
2026-W36	$2.21
2026-W37	$2.36

Questions

How much is Mind Castlin 12172567/398 worth?

Mind Castlin from 25th Anniversary Tin: Dueling Mirrors (12172567/398) has a market estimate of $2.36, up 6.8% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Mind Castlin 12172567/398 rare?

It is a Prismatic Secret Rare from 25th Anniversary Tin: Dueling Mirrors, a 398-card set.

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