Clearly its meant to battle Undead Beasts, like Kirin after he hits 0% HP.......ohwait
I really hope they come out with some better Evolith soon :\, i guess this is how SE works though, you get to choose from a Random Augmenting system that will probably* ruin your item, or a System where you choose your Augment from a Selection of Situational garbage on a bunch of equipment that could never be useful anyway.