Enervation

The caster points a finger at their intended target and rolls a ranged attack roll against the target that ignores armor (but not any Dexterity bonus). If the narrow ray of crackling black energy hits, the target suffers 1d4 negative levels and all of the effects described in Energy Drain in the Basic Fantasy RPG Core Rules. There is no saving throw, only the attack roll. If the target survives, it will lose the negative levels (i.e. regain their levels) after a number of hours equal to the caster’s level. An undead creature struck by the ray gains 5d4 temporary hit points for one hour.