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.

Holon's Castform · Holon Phantoms 44/110

Holon's Castform (Holon Phantoms 44/110), Uncommon, Basic, 50 HP. Market price €1.88, down 1.1% this week. Illustrated by Mitsuhiro Arita. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Card text

Delta Draw — Count the number of Pokémon you have in play that has δ on its card. Draw up to that many cards.

Weekly price history

Week	Market price
2026-W31	€1.97
2026-W32	€1.79
2026-W33	€1.79
2026-W34	€1.77
2026-W35	€1.78
2026-W36	€1.84
2026-W37	€1.85
2026-W38	€1.90
2026-W39	€1.88

Printings & variants

Normal — $4.97

Questions

How much is Holon's Castform 44/110 worth?

Holon's Castform from Holon Phantoms (44/110) has a market estimate of €1.88, down 1.1% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Holon's Castform 44/110 rare?

It is an Uncommon from Holon Phantoms, a 110-card set.

Is Holon's Castform 44/110 tournament legal?

Holon's Castform 44/110 has rotated out of the current formats.

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