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This is a free illustration of the Shining Trapezohedron, a legendary artifact featured in the Cthulhu Mythos. It appears as an irregular black polyhedron, veined with red streaks resembling blood vessels—a form both alien and ominously symmetrical.
The stone is suspended inside an asymmetrical container, held aloft by seven tentacle-like arms extending from the box’s interior walls. Said to allow communication with cosmic entities beyond comprehension, this trapezohedron is used in forbidden rituals, arcane investigations, or occult item lists in horror-themed TRPGs.
Its eerie glow and unnatural geometry evoke dread and fascination—perfect for supernatural overlays, eldritch props, or storytelling assets steeped in dark mythology.

