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.

Machina Citadel · Structure Deck: Mechanized Madness 87074380/41

Machina Citadel (Structure Deck: Mechanized Madness 87074380/41), Ultra Rare. Market price $1.54, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Cannot be Normal Summoned/Set. Must be Special Summoned by a card effect. (Quick Effect): You can target 1 Machine monster you control; destroy that Machine monster and all monsters your opponent controls with ATK less than or equal to it. If a face-up EARTH Machine monster(s) you control, except "Machina Citadel", is destroyed by battle or card effect while this card is in your GY: You can Special Summon this card. You can only use each effect of "Machina Citadel" once per turn.

Weekly price history

Week	Market price
2026-W31	$2.38
2026-W32	$1.33
2026-W33	$1.03
2026-W34	$1.19
2026-W35	$1.19
2026-W36	$1.51
2026-W37	$1.47
2026-W38	$1.54
2026-W39	$1.54

Questions

How much is Machina Citadel 87074380/41 worth?

Machina Citadel from Structure Deck: Mechanized Madness (87074380/41) has a market estimate of $1.54, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Machina Citadel 87074380/41 rare?

It is an Ultra Rare from Structure Deck: Mechanized Madness, a 41-card set.

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