Oathbreaker's End

+1 Dark Obsidian Dagger. Cannot be unattuned
without remove curse. Will reappear next to you
at the start of a long rest. Imprisons the souls of
sentient beings you kill. Can store 5 souls each
increasing the damage by 1d4 necrotic. Consume
a soul to regain 1d10 hitpoints Reaction: When
you hit with the blade you can consume 5 souls to
force a target with less than 75 hp to make a DC
15 constitution save or die. Action: Consume five
souls to curse a creature you can see. Unless its
immune to fea