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 Coral Triangle · Legendary Duelists: Duels From the Deep 84546257/57

Marincess Coral Triangle (Legendary Duelists: Duels From the Deep 84546257/57), Ultra Rare. Market price $0.36, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

2+ "Marincess" monsters You can send 1 WATER monster from your hand to your GY; add 1 "Marincess" Trap from your Deck to your hand. If only your opponent controls a monster: You can banish this card from your GY; Special Summon WATER Link Monsters from your GY whose combined Link Ratings equal exactly 3. You can only use each effect of "Marincess Coral Triangle" once per turn. You cannot Special Summon monsters the turn you activate either of this card's effects, except WATER monsters.

Weekly price history

Week	Market price
2026-W31	$0.43
2026-W32	$0.44
2026-W33	$0.48
2026-W34	$0.42
2026-W35	$0.42
2026-W36	$0.39
2026-W37	$0.38
2026-W38	$0.36
2026-W39	$0.36

Questions

How much is Marincess Coral Triangle 84546257/57 worth?

Marincess Coral Triangle from Legendary Duelists: Duels From the Deep (84546257/57) has a market estimate of $0.36, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Marincess Coral Triangle 84546257/57 rare?

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

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