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?

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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.

Tandemaus · Surging Sparks 157/191

Tandemaus (Surging Sparks 157/191), Common, Basic, 40 HP. Market price €0.04, unchanged this week. Illustrated by USGMEN. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Card text

Play Rough 10+ — Flip a coin. If heads, this attack does 10 more damage.

Weekly price history

Week	Market price
2026-W31	€0.07
2026-W32	€0.04
2026-W33	€0.04
2026-W34	€0.04
2026-W35	€0.04
2026-W36	€0.04
2026-W37	€0.04
2026-W38	€0.04
2026-W39	€0.04

Printings & variants

Normal — $0.19
Reverse Holo — $0.28

Questions

How much is Tandemaus 157/191 worth?

Tandemaus from Surging Sparks (157/191) has a market estimate of €0.04, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Tandemaus 157/191 rare?

It is a Common from Surging Sparks, a 191-card set.

Is Tandemaus 157/191 tournament legal?

Tandemaus 157/191 is legal in Standard and Expanded.

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