Cruel engagement

when you cast this spell as an action you must make a melee or ranged attack. and you add a 1d4 necrotic damage to the attack.  the weapon seeps with dark energy and the souls of the dead. as the blade hits the target the souls leap to the target and seep there life.

If the damage you roll is even you get that much damage back as health. 

this spell increases  to 2d4 at level 5  3d4 at level 8  4d4 at level 11  5d4 at level 15  6d4 at level 20