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.

Dark Blastoise · Legendary Collection 4/110

Dark Blastoise (Legendary Collection 4/110), Holo Rare, Stage2, 70 HP. Market price €55.49, unchanged this week. Illustrated by Mitsuhiro Arita. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

An aggressive Pokémon that tackles anything it sees.

Card text

Hydrocannon 30+ — Does 30 damage plus 20 more damage for each Water Energy attached to Dark Blastoise but not used to pay for this attack's Energy cost. You can't add more than 40 damage in this way.
Rocket Tackle 40 — Dark Blastoise does 10 damage to itself. Flip a coin. If heads, prevent all damage done to Dark Blastoise during your opponent's next turn. (Any other effects of attacks still happen.)

Weekly price history

Week	Market price
2026-W31	€54.30
2026-W32	€55.84
2026-W33	€55.84
2026-W34	€55.84
2026-W35	€55.84
2026-W36	€56.65
2026-W37	€55.49
2026-W38	€55.49
2026-W39	€55.49

Printings & variants

Holo — $213.49
Reverse Holo — $975.00

Questions

How much is Dark Blastoise 4/110 worth?

Dark Blastoise from Legendary Collection (4/110) has a market estimate of €55.49, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Dark Blastoise 4/110 rare?

It is a Holo Rare from Legendary Collection, a 110-card set.

Is Dark Blastoise 4/110 tournament legal?

Dark Blastoise 4/110 has rotated out of the current formats.

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