Talk:Automaton/@comment-29564364-20190719121149/@comment-10429980-20190719175149

Its possible, we know at the very least their essence milking device was created by becoming a monster.

However, we don't know if any mana other than a monster's can reactivate them. That is the mana they initially ran on is of an unknown type, so one can't use it to reactivate them (becoming able to use human essence as fuel apparently happens for them by becoming a monster).