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.

Heavy Mech Support Armor · Structure Deck: Seto Kaiba 39890958/44

Heavy Mech Support Armor (Structure Deck: Seto Kaiba 39890958/44), Common. Market price $0.10, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

If this card is Normal Summoned: You can target 1 Union monster in your GY; Special Summon it. Once per turn, you can either: Target 1 Machine monster you control; equip this card to that target, OR: Unequip this card and Special Summon it. Your opponent cannot target a monster equipped with this card with card effects, also if the equipped monster would be destroyed by battle or card effect, destroy this card instead.

Weekly price history

Week	Market price
2026-W31	$0.10
2026-W32	$0.10
2026-W33	$0.10
2026-W34	$0.10
2026-W35	$0.10
2026-W36	$0.10
2026-W37	$0.10
2026-W38	$0.10
2026-W39	$0.10

Questions

How much is Heavy Mech Support Armor 39890958/44 worth?

Heavy Mech Support Armor from Structure Deck: Seto Kaiba (39890958/44) has a market estimate of $0.10, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Heavy Mech Support Armor 39890958/44 rare?

It is a Common from Structure Deck: Seto Kaiba, a 44-card set.

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