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 Springirl · Legendary Duelists: Duels From the Deep 21057444/57

Marincess Springirl (Legendary Duelists: Duels From the Deep 21057444/57), Super Rare. Market price $0.69, up 9.5% this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

You can banish 1 "Marincess" monster from your GY; Special Summon this card from your hand. If this card is sent to the GY as material for the Link Summon of a WATER monster: You can send cards from the top of your Deck to the GY, equal to the number of "Marincess" monsters you control, then, if a "Marincess" card(s) was sent to the GY by this effect, inflict 200 damage to your opponent for each "Marincess" card sent. You can only use each effect of "Marincess Springirl" once per turn.

Weekly price history

Week	Market price
2026-W31	$0.69
2026-W32	$0.78
2026-W33	$0.72
2026-W34	$0.72
2026-W35	$0.72
2026-W36	$0.64
2026-W37	$0.61
2026-W38	$0.63
2026-W39	$0.69

Questions

How much is Marincess Springirl 21057444/57 worth?

Marincess Springirl from Legendary Duelists: Duels From the Deep (21057444/57) has a market estimate of $0.69, up 9.5% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Marincess Springirl 21057444/57 rare?

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

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