Grenth is a Tyrian god.
And there is a LOT of lore about him.
From WIKI
Take a read about him!
Grenth is the god of death and ice. He is the patron god of Assassins, Water Elementalists, Necromancers, and Ritualists. He is greatly revered and celebrated during the Wintersday Festivals. Grenth allows the existence of the undead and resurrection, whereas Dhuum, his predecessor, did not.
