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.

Rainbow Overdragon · Legendary Duelists: Ancient Millennium 37440988/53

Rainbow Overdragon (Legendary Duelists: Ancient Millennium 37440988/53), Super Rare. Market price $0.13, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

7 "Crystal Beast" monsters (This card is always treated as an "Ultimate Crystal" card.) Must be either Fusion Summoned, or Special Summoned by Tributing 1 Level 10 "Ultimate Crystal" monster (in which case you do not use "Polymerization"). Once per turn: You can banish 1 "Crystal Beast" monster from your GY; this card gains ATK equal to the banished monster's, until the end of this turn. (Quick Effect): You can Tribute this Fusion Summoned card; shuffle all cards on the field into the Deck.

Weekly price history

Week	Market price
2026-W31	$0.14
2026-W32	$0.14
2026-W33	$0.14
2026-W34	$0.15
2026-W35	$0.15
2026-W36	$0.14
2026-W37	$0.14
2026-W38	$0.13
2026-W39	$0.13

Questions

How much is Rainbow Overdragon 37440988/53 worth?

Rainbow Overdragon from Legendary Duelists: Ancient Millennium (37440988/53) has a market estimate of $0.13, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Rainbow Overdragon 37440988/53 rare?

It is a Super Rare from Legendary Duelists: Ancient Millennium, a 53-card set.

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