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.

Castform · Hidden Legends 30/101

Castform (Hidden Legends 30/101), Uncommon, Basic, 60 HP. Market price €1.30, down 12.8% this week. Illustrated by Sumiyoshi Kizuki. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Card text

Poke-POWER: Temperamental Weather — Once during your turn (before your attack), you may search your deck for Sunny Castform, Rain Castform, or Snow-cloud Castform and switch it with Castform. (Any cards attached to Castform, damage counters, Special Conditions, and effects on it are now on the new Pokémon.) Shuffle Castform back into your deck. You can't use more than 1 Temperamental Weather Poké-Power each turn.
Forecast — Search your deck for a Stadium card and play it. Shuffle your deck afterward.
Extra Ball 20+ — If the Defending Pokémon is Pokémon-ex, this attack does 20 damage plus 20 more damage.

Weekly price history

Week	Market price
2026-W31	€1.39
2026-W32	€1.40
2026-W33	€1.40
2026-W34	€1.46
2026-W35	€1.46
2026-W36	€1.64
2026-W37	€1.51
2026-W38	€1.49
2026-W39	€1.30

Printings & variants

Reverse Holo — $25.41
Normal — $3.03

Questions

How much is Castform 30/101 worth?

Castform from Hidden Legends (30/101) has a market estimate of €1.30, down 12.8% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Castform 30/101 rare?

It is an Uncommon from Hidden Legends, a 101-card set.

Is Castform 30/101 tournament legal?

Castform 30/101 has rotated out of the current formats.

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