Naga

Naga is a class of monsters with the head of a human and the body of a snake. Some of the adults are known to have attacks which causes undesirable properties to you, a few of which are quite devastating without a source of magic resistance. Female nagas can lay eggs which may hatch into hatchlings. The hatchlings cannot cast spells and are mostly harmless.

Encyclopedia entry
The naga is a mystical creature with the body of a snake and the head of a man or woman. They will fiercely protect the territory they consider their own. Some nagas can be forced to serve as guardians by a spellcaster of great power.