Dark Rot

This attack infects the target with negative energy and immediately deals 8d4 points of damage. Should the target fail a Wis save all mindless undead within 60ft are drawn to the target and will attack the target above all others, if there are other similar effects in the area there is an equal chance that the undead will attack any single target. The rot also absorbs positive energy; up to 20 points of healing, once all of the healing has been absorbed the spell ends immediately. 

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher the damage increases by 2d4 and the spell absorbs 5 additional points of healing for each slot level above 5th.