diabolic

These magic roots have the likeness of a little man, hideously ugly and misshapen in a weird and diabolic fashion.

I have a 337 great talent for compliment, accompanied by a hateful, even a diabolic frankness.

He crouched like a beast, ferine—all the obscure and diabolic passion of him ready to spring.

Why do we admire intellect when it is united with even diabolic disregard of moral laws?

And here M. Gabet said that, allowing for some jugglery, it was impossible not to conclude that there was diabolic agency at work.