Desecrate Strike

As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell's range, otherwise the spell fails. On a hit, the target suffers the attack's normal effects and takes an extra 1d4 necrotic damage.  If the target is a fey or celestial, it instead takes 1d6 necrotic damage.

This spell's damage increases by 1d4 (or 1d6) when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).