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.

Marincess Aqua Argonaut · Legendary Duelists: Duels From the Deep 20934852/57

Marincess Aqua Argonaut (Legendary Duelists: Duels From the Deep 20934852/57), Ultra Rare. Market price $0.37, up 15.6% this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

2+ WATER monsters While this card is in the Extra Monster Zone, your opponent's monsters cannot attack any monsters, except this one. You can only use each of the following effects of "Marincess Aqua Argonaut" once per turn. You can target 1 WATER monster you control and 1 card your opponent controls; return them to the hand. During your opponent's turn, when a Spell/Trap Card or effect is activated on the field (Quick Effect): You can Special Summon 1 of your "Marincess" Monster Cards equipped to this card, and if you do, negate that activated effect.

Weekly price history

Week	Market price
2026-W31	$0.39
2026-W32	$0.36
2026-W33	$0.33
2026-W34	$0.35
2026-W35	$0.35
2026-W36	$0.35
2026-W37	$0.32
2026-W38	$0.32
2026-W39	$0.37

Questions

How much is Marincess Aqua Argonaut 20934852/57 worth?

Marincess Aqua Argonaut from Legendary Duelists: Duels From the Deep (20934852/57) has a market estimate of $0.37, up 15.6% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Marincess Aqua Argonaut 20934852/57 rare?

It is an Ultra Rare from Legendary Duelists: Duels From the Deep, a 57-card set.

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