Omniheroes - How to clear the Final stage of Celestial Trials (Ethereals boss fight)

Here's a quick guide on how to clear the final stage of Celestial Trials for Ethereals if you happen to be struggling to find the right combination of heroes and relics needed to defeat the boss. ----- Game: Omniheroes IGN: Emperoar Server: T30 #omniheroes #idlerpg #mobilegame