Kreegan

Kreegans, also known simply as Demons, are an ancient, extraterriestrial race capable of space travel. They appear to be eusocial and insect-like, having castes and subclasses within their society. Though only the Queen being able to breed, most Kreegans are at least capable of speech and intelligent thought, using deception and subterfuge in addition to brute strength to aid them in conquering worlds.

In the Heroes series they are portrayed as lacking advanced technology, but their introduction in Might and Magic 6 shows that they arrived to Enroth in an advanced spaceship that mixes high technology with organic-looking aesthetics.