Casting the spell at an object reduces any charge or enchantment on the object by 1. Objects may also resist. An object cannot have its charge or enchantment reduced below zero, and any objects with negative enchantments are unaffected. Casting the spell at yourself drains one experience level, unless you are drain resistant. If you are drained below experience level 1, you die. Losing a level reduces your maximum hit points and your hit points by the same amount - if that put you to zero, you die, too.