Type: God
Alignment: Evil
Gender: Male
Sphere: Poison
Dominion: Towers of Night
Priests: Venomer
Adjective: Zehiric
Domain: Darkness, Poison

Zehir is the evil god of darkness, poison, and assassins. Snakes are his favored creation, and the yuan-ti revere him above all other gods, offering sacrifice to him in pits full of writhing serpents. He urges his followers to:
    Hide under the cloak of night, that your deeds might be kept in secret.
    Kill in Zehir’s name and offer each murder as a sacrifice.
    Delight in poison, and surround yourself with snakes.

Published in Dungeon Master's Guide, page(s) 163.