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.

Mermail Shadow Squad · Rage of the Abyss 53085623/101

Mermail Shadow Squad (Rage of the Abyss 53085623/101), Quarter Century Secret Rare. Market price $0.56, up 1.8% this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

(This card is always treated as an "Atlantean" card.) You can discard 1 card to the GY; WATER monsters you currently control become Level 7 until the end of this turn. If this card is sent to the GY to activate a WATER monster's effect: Special Summon 1 Level 4 or lower "Atlantean" or "Mermail" monster from your Deck, except "Mermail Shadow Squad", also you cannot Special Summon from the Extra Deck for the rest of this turn, except WATER monsters. You can only use each effect of "Mermail Shadow Squad" once per turn.

Weekly price history

Week	Market price
2026-W31	$0.58
2026-W32	$0.56
2026-W33	$0.57
2026-W34	$0.64
2026-W35	$0.64
2026-W36	$0.55
2026-W37	$0.56

Questions

How much is Mermail Shadow Squad 53085623/101 worth?

Mermail Shadow Squad from Rage of the Abyss (53085623/101) has a market estimate of $0.56, up 1.8% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Mermail Shadow Squad 53085623/101 rare?

It is a Quarter Century Secret Rare from Rage of the Abyss, a 101-card set.

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