You empower an undead servant by transferring a spell to the undead. Choose a spell you can cast, sacrificing the corresponding mana. The undead gains the ability to cast that spell once before your next long rest.
A black aura pulses from your hands, shadows intertwining with the undead’s form. Glowing runes materialize on its surface, absorbing your energy. The dark light settles, marking the undead with the transferred spell’s power.