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.

Fossil Dragon Skullgios · Battles of Legend: Armageddon 21225115/94

Fossil Dragon Skullgios (Battles of Legend: Armageddon 21225115/94), Secret Rare. Market price $0.19, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

1 Rock monster + 1 Level 7 or higher monster in your opponent's GY Must first be Special Summoned with "Fossil Fusion". Before damage calculation, if this card battles an opponent's monster: You can switch the current ATK and DEF of that opponent's monster until the end of that Damage Step. If this card attacks a Defense Position monster, inflict piercing battle damage. If this Fusion Summoned card battles an opponent's monster, any battle damage it inflicts to your opponent is doubled.

Weekly price history

Week	Market price
2026-W31	$0.15
2026-W32	$0.16
2026-W33	$0.17
2026-W34	$0.17
2026-W35	$0.17
2026-W36	$0.20
2026-W37	$0.20
2026-W38	$0.19
2026-W39	$0.19

Questions

How much is Fossil Dragon Skullgios 21225115/94 worth?

Fossil Dragon Skullgios from Battles of Legend: Armageddon (21225115/94) has a market estimate of $0.19, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Fossil Dragon Skullgios 21225115/94 rare?

It is a Secret Rare from Battles of Legend: Armageddon, a 94-card set.

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