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.

Hydor, the Base of All Things · Supreme Darkness 30339825/101

Hydor, the Base of All Things (Supreme Darkness 30339825/101), Common. Market price $0.14, down 6.7% this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Target 1 monster in either GY; destroy 1 WATER monster on the target's owner's field, and if you do, Special Summon that target to that field in Defense Position. If this card is in your GY, except the turn it was sent there: You can banish this card, then target 1 WATER monster in either GY; destroy 1 monster on the targeted monster's owner's field, and if you do, Special Summon that targeted monster to that field in Defense Position. You can only use 1 "Hydor, the Base of All Things" effect per turn, and only once that turn.

Weekly price history

Week	Market price
2026-W31	$0.10
2026-W32	$0.10
2026-W33	$0.13
2026-W34	$0.13
2026-W35	$0.13
2026-W36	$0.15
2026-W37	$0.14

Questions

How much is Hydor, the Base of All Things 30339825/101 worth?

Hydor, the Base of All Things from Supreme Darkness (30339825/101) has a market estimate of $0.14, down 6.7% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Hydor, the Base of All Things 30339825/101 rare?

It is a Common from Supreme Darkness, a 101-card set.

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