If you control monsters of exactly 2 different Extra Deck monster card types (Fusion, Synchro, or Xyz): Apply the appropriate effect, depending on the current 2 types you control.
● Fusion and Synchro Monster: Special Summon 1 "Outer Entity" Xyz Monster from your Extra Deck, and if you do, attach this card to it as an Xyz Material.
● Synchro and Xyz Monster: Special Summon 1 "Elder Entity" Fusion Monster from your Extra Deck.
● Xyz and Fusion Monster: Special Summon 1 "Old Entity" Synchro Monster from your Extra Deck.
You can only activate 1 "Forbidden Trapezohedron" per turn.
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