This is the hardest and weirdest looking final boss that I've ever been challenged to. he is undefeatable, how do I beat this thing? his ice breath deals around 90 to each of my characters and his physical attacks can do from 112-310! There is no way I can beat him, here are my character's stats and there weapons that are equipped

Eight lv. 40 weapon: Liquid metal sword,
Yangus lv.39 weapon: True Barbarian's Axe
Jessica lv.39 weapon: Scourge Whip
Angelo lv.39 weapon: Great Bow, obtained fromm Tyran Gully.