Banish Illusion

The caster may use this spell against any group of creatures, single character, or object within 48 yards which he or she suspects of being an illusion. There is a base 50% that the spell will destroy any target illusion, modified as follows. For each level by which the caster of the Banish spell exceeds the caster of the illusion, increase the chance of success by 10%. For each level by which the caster of the illusion exceeds the caster of the Banish spell, reduce the chance by 5%.