where do you see imbalance here? you can only change some numeric parameters.
Can you change the number of killed creatures for it? from its - 1, to say 50? or better make it random - from 20 to 100. And with its current state - yeah it's junk, I actually removed it for now, since it essentially does nothing. And for strong creatures, I just set -
so that instant-kill abilities don't affect them at all.
<Item>ABILITY_CRYSTAL_SCALES</Item>