Void of Hadar

You summon the void of Hadar, it kills everyone in the radius except the caster and give the caster all of the hitpoints of the creatures killed permanantly. When you cast this again, you get instantly killed with no method of coming back.

The first time you ever cast this spell you get the curse of hadar forever. Nothing can remove this curse except for hadar itself. When you have this curse on you you must feed on souls, atleast 5 souls from humanoids a week to feed the void of hadar. If you don't, you will be sent to hadar and devoured.

This curse goes away when hadar has fed on 1000 souls.