Oathbreaker's End

+1 Dagger. Cannot be unattuned without remove
curse. Will reappear next to you when starting a
long rest. When you slay a sentient being the
dagger will imprison its soul preventing
resurrection. Can store 5 souls, each increasing
the damage by 1d4 necrotic. You can release a
soul for 1d10 hitpoints each. Annihilation: As a
reaction when hitting a creature, you can release
all 5 souls. If the creature has less than 75 hit
points it must make a DC 15 con save or die.
When sleeping you can hear