Gruumsh

Gruumsh was an orc god and a greater deity. He was envisioned with one eye by all who named him a god and was a deity mainly worshiped by orcs and orogs.

Orc war priests wore a patch over one eye to symbolize their worship of the orc deity. They also dressed in dark red vestments, armored with war helms and black plate mail. Gruumsh's sacred animal was the giant rat, his holy day was the new moon, and he was worshiped in orcish lairs where blood was sacrificed to him monthly.