It all depends on what you're trying to go for, but when I think of beauty in crue1ty, i think of wildfir3s. Say you have a forest, then during a storm lightning strikes and the forest burn down. Wildfir3s are a natural part of many environments.
They are nature's way of clearing out the unalived litter on forest floors. This allows important nutrients to return to the soil, enabling a new healthy beginning for plants and animals. So with a wildfire comes new and healthier plants, even if forest burning seems crue1.
Or for the beauty in cruelty, you take pet crue1ty. People wear cool looking fur coats, but what did the fur come from?
(not sure if this helped, but if its for an art project or something, id love to see the final product!)