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.

Forbidden Trapezohedron · Shadows in Valhalla 49033797/60

Forbidden Trapezohedron (Shadows in Valhalla 49033797/60), Secret Rare. Market price $0.25, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

If you control exactly 2 monster card types (among Fusion, Synchro, and/or Xyz): Apply the following effect based on those types. ● Fusion and Synchro: Special Summon 1 "Outer Entity" Xyz Monster from your Extra Deck, and if you do, attach this card to it as material. ● Synchro and Xyz: Special Summon 1 "Elder Entity" Fusion Monster from your Extra Deck. ● Xyz and Fusion: Special Summon 1 "Old Entity" Synchro Monster from your Extra Deck. You can only activate 1 "Forbidden Trapezohedron" per turn.

Weekly price history

Week	Market price
2026-W31	$0.23
2026-W32	$0.23
2026-W33	$0.22
2026-W34	$0.22
2026-W35	$0.22
2026-W36	$0.26
2026-W37	$0.26
2026-W38	$0.25
2026-W39	$0.25

Questions

How much is Forbidden Trapezohedron 49033797/60 worth?

Forbidden Trapezohedron from Shadows in Valhalla (49033797/60) has a market estimate of $0.25, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Forbidden Trapezohedron 49033797/60 rare?

It is a Secret Rare from Shadows in Valhalla, a 60-card set.

Browse more Yu-Gi-Oh cards · All Shadows in Valhalla cards · Build a deck · Track your collection