Torturer's Chant

The caster begins a droning chant that's purpose is to break the will of a target.  At the end of the chant, the target must make a Wisdom saving throw or their Wisdom Ability is reduced by two and they gain a level of exhaustion.    

Ability points and exhaustion levels are healed normally through rest or can be recovered using a Long Rest.  

The Harrower's use this spell to weaken resolve during torture sessions.