God of Conquest, Survival, Strength, and Territory
According to Unearthed Arcana, Gruumsh created the orcs in his image to be his servants in the world but was cheated out of a home for his people by the other gods. He is also considered a member of the default pantheon of deities. His symbol is an unblinking eye. A figure of fury and driven cruelty, Gruumsh rules his pantheon with brute power. His favored weapon is the spear.
Gruumsh’s divine realm is the Iron Fortress on the plane of Nishrek.
Nishrek was once an independent realm in the Astral Sea. After the rise of Bane in the realm of Chernoggar, Gruumsh used all of his power to throw his entire realm (literally) at him. Bane was able to stop Nishrek from crushing him only by fusing both realms together. The force of the impact sent the two realms spinning through the Astral Sea and to this day they fly recklessly through the plane as the forces of Bane and Gruumsh fight an eternal war.
Gruumsh is the husband of Luthic and father of Bahgtru. Ilneval is his most capable lieutenant. In his own pantheon, Gruumsh rules over all the other gods (although Shargaas and Yurtrus bear him little real loyalty beside that made from fear), and has his orders carried out through his lieutenant Ilneval. Gruumsh considers himself supreme and all non-orcs his enemies, while holding special enmity for some. While Gruumsh hates all elf deities, he has special loathing for Corellon Larethian and Sehanine Moonbow, who fooled Gruumsh many times to protect Corellon and her other family members. Gruumsh also loathes the dwarf deities.