Soul Reaper

You have learned the unholy art of extracting a creatures soul at the moment of death to use for your wicked purposes.

You gain access to the Soul Trap spell 

Additionally,  you gain the ability to, as an action, consume a number of soul-points to regain used spell slots. You consume one soul-point per spell level-slot. For example,  you can consume one soul-point to recover 1 level 1 spell slot, or three soul-points for 1 level 3 spell slot.