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.

Umbreon · Undaunted 10/90

Umbreon (Undaunted 10/90), Holo Rare, Stage1, 90 HP. Market price €19.34, up 2.2% this week. Illustrated by Mitsuhiro Arita. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

When agitated, this Pokémon protects itself by spraying poisonous sweat from its pores.

Card text

Moonlight Fang 30 — During your opponent's next turn, prevent all effects, including damage, done to Umbreon by attacks from your opponent's Pokémon that has any Poké-Powers or Poké-Bodies.
Quick Blow 30+ — Flip a coin. If heads, this attack does 30 damage plus 30 damage.

Weekly price history

Week	Market price
2026-W31	€16.99
2026-W32	€18.67
2026-W33	€19.13
2026-W34	€18.97
2026-W35	€19.31
2026-W36	€21.30
2026-W37	€19.17
2026-W38	€18.93
2026-W39	€19.34

Printings & variants

Holo — $96.83
Reverse Holo — $199.99

Questions

How much is Umbreon 10/90 worth?

Umbreon from Undaunted (10/90) has a market estimate of €19.34, up 2.2% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Umbreon 10/90 rare?

It is a Holo Rare from Undaunted, a 90-card set.

Is Umbreon 10/90 tournament legal?

Umbreon 10/90 has rotated out of the current formats.

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