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.

Caius the Mega Monarch · Secrets of Eternity: Super Edition 87288189/14

Caius the Mega Monarch (Secrets of Eternity: Super Edition 87288189/14), Ultra Rare. Market price $0.63, up 5.0% this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

You can Tribute Summon this card by Tributing 1 Tribute Summoned monster. If this card is Tribute Summoned: Target 1 card on the field; banish it, and if you do, inflict 1000 damage to your opponent, then, if it is a DARK Monster Card, banish all cards with that name from the hand, Main Deck, Extra Deck, and GY of the player who controlled it. If this card was Tribute Summoned by Tributing a DARK monster, add this additional effect. ● You can target 2 cards, instead.

Weekly price history

Week	Market price
2026-W31	$0.62
2026-W32	$0.63
2026-W33	$0.62
2026-W34	$0.61
2026-W35	$0.61
2026-W36	$0.61
2026-W37	$0.61
2026-W38	$0.60
2026-W39	$0.63

Questions

How much is Caius the Mega Monarch 87288189/14 worth?

Caius the Mega Monarch from Secrets of Eternity: Super Edition (87288189/14) has a market estimate of $0.63, up 5.0% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Caius the Mega Monarch 87288189/14 rare?

It is an Ultra Rare from Secrets of Eternity: Super Edition, a 14-card set.

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