Scorpion Men

The Scorpion Men are the spawn of Tiamat in Mesopotamian myth. They are described as giants, with a "glance of death." Much like the Greek Gigantes they were born to fight a younger generation of gods who usurp their forebearers.

Wyvren

The Wyvren is a type of dragon, often found described in medieval bestiaries. It is depicted as a large beast, with two legs, wings with claws, a horned head, and a pointed spade on the tip of it's tail. The beast can be found in wells, ponds, lakes, caves, or damp forests. Wyvrens are said to attack males on sight, but will blush when confronted with a naked female (connected to the monster-abducts-maiden archetype?)

Cryptozoologists have theorized that the Wyvren may have originated from sightings of pterosaurs or other ancient flying reptiles.

Tiamat

In Babylonian mythology, Tiamat is the chaotic mother goddess who gives birth to the gods. In revenge for the slaying of her husband Apsu, she brings forth a multitude of monsters to make war upon the gods, including dragons, serpents, scorpion men, etc. She is eventually slain by the storm god Marduk, and her body is used to form the Earth.

Although in ancient myth she is represented with a human form, over the centuries she has become more closely associated wtih a dragon herself.