The Archive of Esoteric Secrets
6-level Necromancy
You slowly seep the essence of a dead spellcaster into their skull, alighting it in green hellfire and animating it as your eternal servant. The skull animates as a flameskull (see pg 134 of the Monster Manual) and follows your spoken commands with devilish intellect until forever destroyed. Whenever you cast the spell, a zone that encompasses an area up to a 30-foot radius sphere is formed. Only whilst in this zone does the flameskull gain the benefits of its rejuvenation trait.