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.

Island Cave · Hidden Legends 89/101

Island Cave (Hidden Legends 89/101), Uncommon. Market price €1.29, up 4.0% this week. Illustrated by Ken Ikuji. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Card text

This card stays in play when you play it. Discard this card if another Stadium card comes into play. Whenever any player attaches an Energy card from his or her hand to Water Pokémon, Fighting Pokémon, or Metal Pokémon, remove any Special Conditions from that Pokémon.

Weekly price history

Week	Market price
2026-W31	€1.25
2026-W32	€1.20
2026-W33	€1.20
2026-W34	€1.22
2026-W35	€1.22
2026-W36	€1.22
2026-W37	€1.22
2026-W38	€1.24
2026-W39	€1.29

Printings & variants

Normal — $1.35
Reverse Holo — $2.31

Questions

How much is Island Cave 89/101 worth?

Island Cave from Hidden Legends (89/101) has a market estimate of €1.29, up 4.0% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Island Cave 89/101 rare?

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

Is Island Cave 89/101 tournament legal?

Island Cave 89/101 has rotated out of the current formats.

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