This cantrip is designed to provide a small but consistent healing option for undead creatures, including the sorcerer themselves if they're undead. It fits thematically with the concept of channeling necrotic energy to mend wounds, and the scaling with higher spell slots ensures its usefulness as the character progresses in power.   You channel necrotic energy through your touch, mending wounds on the undead creature you touch. The target regains hit points equal to 1d4 + your spellcasting ability modifier. This spell has no effect on non-undead creatures.