Dream Siphon

When you cast this spell, target creature must make a Wisdom save DC equal to the caster’s spell DC. On a success, the creature takes 1d4+1 psychic damage. On a failed save the creature is stunned for 1 round and takes 1d4+1 psychic damage. In addition, when a creature fails their save, roll a d100. If you roll a 20 or lower you regain one 1 level spell slot as you have successfully siphoned the dream magic from the target creature. If the target of this spell is already asleep, they automatically fail their save and wake up upon taking the listed damage.

A creature that succeeds on its saving throw is immune to further uses of this spell for 1 hour.