ATTRIBUTE: SPELL
CARD TYPE: Normal Spell
DESCRIPTION: Apply this effect, depending on the Extra Deck monster card types (Fusion, Synchro, or Xyz) of monsters you control. You must control exactly 2 different monster card types to activate and to resolve this effect. • Fusion and Synchro: Special Summon 1 "Outer Entity" Xyz Monster from your Extra Deck, and if you do, attach this card to it as Xyz 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.

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PRICE FAQ

What is Forbidden Trapezohedron (Shadows in Valhalla) worth today?

Forbidden Trapezohedron [1st Edition] has a TCGplayer market price of $0.25 as of 2026-09-17.

What is the all-time high price for Forbidden Trapezohedron?

In TickerMint's daily data (since September 2026), the all-time high market price for Forbidden Trapezohedron [1st Edition] is $0.25 (2026-09-16) and the all-time low is $0.25 (2026-09-16).

What would a seller actually net for Forbidden Trapezohedron?

The TickerMint Estimate for Forbidden Trapezohedron is $0.25. It is a fee-adjusted fair value blending TCGplayer and eBay data to estimate what a seller nets after marketplace fees.

how these numbers are computed →

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