Grelok

Grelok was the villain of the Grognak the Barbarian game Reign of Grelok.

Background
A monster with a horned head, he took over several large villages surrounding a mountain, and Grognak set out to defeat him. Grelok also had the power to rejuvenate individuals and turn them into zombies.

Grelok was later defeated by Grognak, and peace was returned to the world.

Appearances
Grelok is mentioned in Fallout 3. Grelok is the main villian in Fallout 4 holodisc minigame Grognak the Barbarian and the Ruby Ruins