For each nearby corpse, you and nearby Allies Regenerate 5 Mana
per second, up to 50 per second
Regenerate 8% of Energy Shield over 2 seconds when you Consume a corpse
Regenerate 8% of Mana over 2 seconds when you Consume a corpse 
Essence Glutton is a Notable Ascendancy passive skill for the Necromancer that grants energy shield and mana regeneration per nearby corpse to you and nearby allies, plus additional energy shield and mana regeneration to you if you've consumed a corpse in the past 2 seconds.