Sylren's Night Terror

This spell can only be cast on a sleeping target. Target makes a wisdom saving throw at disadvantage. On a failed save target takes one level of exhaustion, does not benefit from the effects of a long rest, and is subject to a night terror. The night terror takes form at the discretion of the caster. The night terror can influence the target in many different ways at the discretion of caster and DM. At the end of 7 days, target re-rolls saving throw without disadvantage to no longer be under the influence of the night terror. If the target succeeds on the saving throw, no effect happens.