- This card is probably based on the Shining Trapezohedron, an artifact appearing in H. P. Lovecraft's short story The Haunter of the Dark and Robert Bloch's sequel, The Shadow from the Steeple, which could summon the Outer Entity Nyarlathotep in The Haunter of the Dark avatar-hence its effect.
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Card Trivia:Forbidden Trapezohedron
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