Invisibility to y spells and sanctuary

[Grammarsalad]

Allow a save. Steps:

1. Protect targets from x.
2. target also constantly 'casts' spell--i.e. like detect traps, but no notification-- that changes ids of all creatures of said type to x if they don't save (effect 72).
   3)last effect protects against this sec spell.

Also do something like this for sanctuary revision