

If creature has SR, make a check since the magic circle/protection from evil spell says: "Spell resistance can allow a creature to overcome this protection and touch the warded creature." 3.

Evil caster summons fiendish monster and targets area inside (unbeknownest to the evil caster) magic circle against evil. I grabbed a Mierce Miniatures monster, because I had recently painted one with my usual Reaper and Secret Weapon paints.
