Forbidden Trapezohedron is a Secret Rare Spell Card card from Yu-Gi-Oh! (Shadows in Valhalla, SHVA). Current market price: $0.22.
Secret Rare
Shadows in Valhalla (SHVA)
Card Text
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.
