Karawasa's Essence

[Siegelement]

I was just playing and this spawned for me, (-AR) I didn't get to kill it before I lost..Could someone explain what it does if you kill it?

[holepercent]

it gives an elemental essence, the option to build a (extra) pure/periodic (in addition to the 2 free ones you get after wave 51 and 56.) . In fact, you can build the pure before it is killed. so if you have the gold, build the pure first..