Crippling Fatigue

You engulf the target in a black mass of tendrils that drains it's strength. The target must make a constitution saving throw. The target takes 2d6 necrotic damage or half as much on a successful save. On a failed save the target suffers a -2 penalty to dexterity, strength and constitution saving throws for 1 round.

You may cast this spell if you have expended all your available spell slots by taking 1d4 necrotic damage as part of casting the spell. You may do this up to 4 times per long rest.