Conduit of Void and Vitality

You use the unstable energy of your curse to manipulate the most basic of divine magic. You cast a 3-action heal or harm spell, expending the slot as normal. If the spell restores Hit Points to one or more creatures, then one creature healed by this spell regains a number of additional Hit Points equal to 1d8 × your Cursebound value; if the spell damages one or more creatures, then one creature harmed by this spell takes additional damage equal to 1d8 × your cursebound value.