This creature is cursed to view the horrors that lay beyond the vail.
You mark a creature with an Invisible Curse, which only Sentience Surges when they go to Slumberwave.
When this creature Slumberwaves, they travel to an unknown land filled with Aberrations and perceive everything through one of these beings eyes. When the creature awakes, they remember everything vividly and must roll an Soul Contesting Roll or gain a stack of Exhausted and do not benefit from a Long Rest.