The FASTEST Heat Plasma Battery Farm! The First Descendant

Is as you see! this is either the fastest or best currently out there.
this is Hagios - Old Mystery - Hard mode
LET IT BE KNOWN you don't have to finish the mission to get the heat plasma batteries, i meant to cover that in the voice lines, but Brain Lagg hits like a brick sometimes.

[@ecoman351]

pretty wild i just did this mission and bosses kept spawning in! at least 4 of them...tons of heat plasma batteries.
i had only done 4 of 6 circles