Devour

You attempt to devour a creatures essence, dealing 1d4 spirit damage and forcing your target to make a wisdom save. On a failed save, you gain an additional stack of essence-theft, assuming you are able to steal essence whilst casting this spell.

Whenever you kill a creature using this spell - if you are able to - you will gain two extra stacks.

At higher Levels: The spells damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4) and once again at 17th level (4d4)