Your resistance to arcane magic comes at a price. The mere presence of arcane magic makes you ill.
Prerequisites: No Friend to the Arcane
Penalty: Whenever you are being effected by an arcane spell, you are Sickened. If you are affected by a spell such as Fireball, that has an immediate effect, you are Sickened for one round. If you are in an area which has a persistent arcane spell active, you must make a Fortitude save equal to 10+ the number of rounds you have been in the area. If the save is failed, you become Sickened until you leave the area.