Mischievous Merrymakers. When the moon is full, the korrigan begin their revels, joining hands and dancing in circles, singing melodies so joyous that others feel compelled to join. Unfortunately, dancing for too long can prove dangerous - even deadly - to mortals, especially "stodgy" religious folk, who lack the stamina of the fey. When they are not at their revels, korrigan enjoy humiliating mortals by making the creatures do silly things. If its victim doesn't see the funny side of its pranks, a korrigan can exhale its poisonous breath on the creature to dispatch the humorless creature.