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?

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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.

Quagsire · HeartGold SoulSilver 9/123

Quagsire (HeartGold SoulSilver 9/123), Holo Rare, Stage1, 100 HP. Market price €7.00, up 10.9% this week. Illustrated by match. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Due to its relaxed and carefree attitude, it often bumps its head on boulders and boat hulls as it swims.

Card text

Muddy Water 40 — Does 20 damage to 1 of your opponetn's Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)
Mud Shot 60

Weekly price history

Week	Market price
2026-W31	€4.97
2026-W32	€4.96
2026-W33	€4.96
2026-W34	€5.53
2026-W35	€5.75
2026-W36	€6.06
2026-W37	€6.31
2026-W38	€6.31
2026-W39	€7.00

Printings & variants

Holo — $24.65
Reverse Holo — $24.42

Questions

How much is Quagsire 9/123 worth?

Quagsire from HeartGold SoulSilver (9/123) has a market estimate of €7.00, up 10.9% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Quagsire 9/123 rare?

It is a Holo Rare from HeartGold SoulSilver, a 123-card set.

Is Quagsire 9/123 tournament legal?

Quagsire 9/123 has rotated out of the current formats.

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