Darkest Hour

Target one creature you can see within range. Whisper an utterance of profane and forbidden knowledge, causing the target to feel immense terror as they fall to the ground on a failed wisdom saving throw. From the target's perspective, they're trapped in a dark room with walls and floor made of writhing flesh, tendons, bones, and sinew. They must continue to make wisdom saving throws each turn or suffer 4 D6 psychic damage. On a successful saving throw the target will be released from the vision, maintaining any damage taken.

when upcasted the spell can increase 1d6 psychic damage per level