So i was running around walz castle hopefuly looking for tresure chests. i entered a strange hallway and was immediatly put into a radom battle with some demon looking thing called jackanapes (sp) it was a back attack on him so i thought this would be easy. he hits my knight for 200 damage, then hits my white mage for 500 damage? what did i run into?

this was in world one by the way, and even my monk could not even pass 0 damage on him.

what's the story with this monster?