Wyvern in Heroes 5

Dwelling in the barren hillsides and hunting wild aurochs, the Wyverns are distinguished by their ill-tempered character and a peculiar habit of killing anyone or anything that does not bear a close resemblance to an Orc. It is said that the wyverns are degenerate dragons, transformed under the power of some cursed magic; but that remains nothing more than conjecture since those who created the wyvern are all dead - probably killed by their own creation.