- "We can't run. Eyghon will find us. This mark might as well be a homing beacon."
- ―Ethan Rayne[src]
The Mark of Eyghon was a ritual mark associated with the demon Eyghon and worn by his initiates. Those tattooed with it shared a psychic link with Eyghon, allowing him to track them, and others bearing the mark. The proximity of Eyghon caused the mark bearers to experience flash-like visions when sleeping.