Invisibility to Undead

This spell is quite similar to sanctuary, but only affects undead of 4 or fewer hit dice. 

A saving throw versus spell is made for each type of undead within 30 feet of the caster, and if failed, all undead of that type will ignore the caster completely for the duration of the spell. 

(Note that this negates subsequent attempts by the caster to turn those undead.) 

However, if the saving throw succeeds, all undead of that type will attack the spell caster in preference to any other possible targets.

The effect of this spell ends if the caster attacks or attempts to cast any other spell. 

If the caster is of Neutral morals (with respect to Good and Evil), the undead save at -2. 

The material component is the cleric's holy symbol.