The immensely powerful 12 Clusterlords rule over clusters of galaxies. Here's Ballistaur, the 8th strongest, who is building a revolutionary army to overthrow the scientist and take the power of Creation for himself. His body is extremely hard, rendering any attacks useless. Corroding his thick skin is the best way to affect him. Death's Axe absorbs the souls of anyone it touches and siphons their strength to the wielder.
If you don't know what any of this means, see "Lord Poithon," the first work in this series, for a detailed explanation of the whole idea.