While in the normal Campaign Dungeon Chi is already a tough opponent you will face it again in the Challenge Mode - in an even tougher form. Chi loves to dogde attacks, purges the buffs of your Heroes with passion, and hunts every Element except Dark (It's a File:Nature Hunter.png Nature Hunter, and Water Hunter, etc). That way it can deal boosted damage to most Heroes, and with its Spirit based Thundercracker special attack it can instantly kill Heroes. On top of this Chi has two taunting bodyguards.