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.

Octillery · Mysterious Treasures 57/123

Octillery (Mysterious Treasures 57/123), Uncommon, Stage1, 80 HP. Market price €0.34, unchanged this week. Illustrated by Kagemaru Himeno. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

It lives in the gaps of boulders and in holes on the seafloor. Its suction cups grip prey tightly.

Card text

Crash Bomber 30+ — If the Defending Pokémon has any Special Energy cards attached to it, this attack does 30 damage plus 30 more damage. Then, discard a Special Energy card attached to the Defending Pokémon.
Aqua Liner — Choose 1 of your opponent's Benched Pokémon. This attack does 40 damage to that Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)

Weekly price history

Week	Market price
2026-W31	€0.34
2026-W32	€0.35
2026-W33	€0.35
2026-W34	€0.34
2026-W35	€0.34
2026-W36	€0.27
2026-W37	€0.35
2026-W38	€0.34
2026-W39	€0.34

Printings & variants

Normal — $0.39
Reverse Holo — $3.95

Questions

How much is Octillery 57/123 worth?

Octillery from Mysterious Treasures (57/123) has a market estimate of €0.34, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Octillery 57/123 rare?

It is an Uncommon from Mysterious Treasures, a 123-card set.

Is Octillery 57/123 tournament legal?

Octillery 57/123 has rotated out of the current formats.

Browse more Pokémon cards · All Mysterious Treasures cards · Build a deck · Track your collection