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.

Union Driver · Eternity Code Premiere! promotional card 99249638/1

Union Driver (Eternity Code Premiere! promotional card 99249638/1), Ultra Rare. Market price $0.28, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Once per turn, you can either: Target 1 face-up monster you control; equip this card to that target, OR: Unequip this card and Special Summon it. If the equipped monster would be destroyed by battle or card effect, destroy this card instead. While this card is equipped to a monster: You can banish this Equip Card; equip 1 Level 4 or lower appropriate Union monster from your Deck to the monster this card was equipped to. You can only use this effect of "Union Driver" once per turn.

Weekly price history

Week	Market price
2026-W31	$0.20
2026-W32	$0.22
2026-W33	$0.23
2026-W34	$0.23
2026-W35	$0.23
2026-W36	$0.26
2026-W37	$0.26
2026-W38	$0.28
2026-W39	$0.28

Questions

How much is Union Driver 99249638/1 worth?

Union Driver from Eternity Code Premiere! promotional card (99249638/1) has a market estimate of $0.28, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Union Driver 99249638/1 rare?

It is an Ultra Rare from Eternity Code Premiere! promotional card, a 1-card set.

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