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.

Marsh Flats · Secret Lair: Ultimate Edition 1/16

Marsh Flats (Secret Lair: Ultimate Edition 1/16), Rare, Land. Market price $40.75, down 1.1% this week. Illustrated by Alayna Danner. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Weekly price history

Week	Market price
2026-W31	$41.76
2026-W32	$41.94
2026-W33	$42.29
2026-W34	$41.14
2026-W35	$41.14
2026-W36	$40.86
2026-W37	$40.84
2026-W38	$41.21
2026-W39	$40.75

Questions

How much is Marsh Flats 1/16 worth?

Marsh Flats from Secret Lair: Ultimate Edition (1/16) has a market estimate of $40.75, down 1.1% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Marsh Flats 1/16 rare?

It is a Rare from Secret Lair: Ultimate Edition, a 16-card set.

Browse more Magic: The Gathering cards · All Secret Lair: Ultimate Edition cards · Build a deck · Track your collection