Become Bones

This spell temporarily alters the body of the caster into the semblance of a human skeleton, causing flesh, tissue, organs (including eyes), clothing, and gear to become invisible. The skills, mobility, and functions of the body are unaltered. While in this form, unintelligent undead creatures ignore the caster.

This spell is normally used to disguise the caster's identity (or even presence, if used in a crypt). It can be ended early (and instantly) if the caster commands it to expire. The effects do not automatically expire if the caster attacks, as in invisibility.