Aether Strider

Speak the secret name of Annen and blind his foes.  When you cast Aether strider you become invisible to all senses of the creatures within sight of you (friendly creatures included).  You may still be discovered by a perception or investigation check with a base DC of 22, this is modified by your stealth modifier.  If the spell caster is incapacitated via magics or death the spell immediately ends.