Voidwalker has the ability Soothing kiss. A succubus spell! #1364
This happened a few days ago when I was learning spells for my summoned pets through pet grimoires, I was spam clicking the Soothing Kiss grimoire while summoning voidwalker instead of the aoe taunt book if I recall, by accident.
Anyway, here's an image showing my voidwalker with Soothing Kiss in his spellbook.