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.

Metalfoes Mithrilium · Invasion: Vengeance: Special Edition 4688231/4

Metalfoes Mithrilium (Invasion: Vengeance: Special Edition 4688231/4), Ultra Rare. Market price $0.15, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

1 "Metalfoes" monster + 1 Pendulum Monster You can target 2 "Metalfoes" cards in your GY and 1 card on the field; shuffle the targets from your GY into the Deck, and if you do, return the target on the field to the hand. You can only use this effect of "Metalfoes Mithrilium" once per turn. If this card is sent from the field to the GY: You can Special Summon 1 "Metalfoes" Pendulum Monster from your GY or face-up Extra Deck.

Weekly price history

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

Questions

How much is Metalfoes Mithrilium 4688231/4 worth?

Metalfoes Mithrilium from Invasion: Vengeance: Special Edition (4688231/4) has a market estimate of $0.15, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Metalfoes Mithrilium 4688231/4 rare?

It is an Ultra Rare from Invasion: Vengeance: Special Edition, a 4-card set.

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