Grumbar

Grumbar (pronounced GRUM-bar ), or the Earthlord, was the elemental embodiment of earth. He was one of the four elemental deities worshiped in Faerûn. Grumbar, like the other elemental deities (except Kossuth) had a minimum of followers in Faerûn, and he cared little indeed for most of those worshipers, as his power came from the many elemental devotees in both the Underdark and the Elemental Plane of Earth. It was recently uncovered in the wake of the Spellplague that Grumbar was not a proper deity at all, but rather a primordial. Nonetheless, he retained worshipers and had power equivalent to that of a god.

Worshipers
The church of Grumbar was organized into small sects known as Holds, each comprising seven clerics, seven monks, and seven rangers and as many laity as could be supported. Those who followed the Earthlord could often be found in public preaching against evils of boarding ships and setting sail to uncharted lands, preferring exploration on the continent of Faerûn.

Worship in Zakhara
On the continent of Zakhara, Grumbar was called one of the cold gods of the elements. As those were seen as uncaring for human affairs, they were considered opposed to the Land of Fate's pervasive culture of Enlightenment. Only a few Zakharans were willing to worship a cold god in order to gain power.

Relationships
Grumbar had ties with other deities of elemental earth, including Geb, Garl Glittergold, Dumathoin, Laduguer, and Urogalan, but these were loose at best. Grumbar was opposed to Akadi and her flimsy and ever-changing ways. In the battle of the archomentals of Sunnis and Ogrémoch, Grumbar secretly balanced one against the other, remaining the most powerful ruler of elemental earth himself. Ogrémoch is actually one of Grumbar's children, as is Entemoch, Ogrémoch's twin. Grumbar and Luthic were involved in a secret romance behind Gruumsh's back.

Advanced Dungeons & Dragons 1st edition (1977-1988)
Ed Greenwood initially used Grome, one of Moorcock's Elemental gods as found in the original Deities & Demigods, as the elemental lord of earth for his home Dungeons & Dragons campaign set in the Forgotten Realms. As Greenwood indicated in his article "Down-to-earth Divinity" in Dragon #54 (October 1981), Moorcock's elemental gods "may later be replaced in [his] universe by 'official' AD&D beings as these are published". Grumbar first appeared in the original Manual of the Planes (1987), and was featured as one of the elemental lords for the Forgotten Realms in the Forgotten Realms Campaign Set's "Cyclopedia of the Realms" booklet (1987).

Advanced Dungeons & Dragons 2nd edition (1989-1999)
Grumbar was described in the hardback Forgotten Realms Adventures (1990), the Forgotten Realms Campaign Setting (1993) in the "Running the Realms" booklet, and Faiths & Avatars (1996).

Dungeons & Dragons 3rd edition (2000-2007)
Grumbar appears as one of the major deities of the Forgotten Realms setting again, in Forgotten Realms Campaign Setting (2001), and is further detailed in Faiths and Pantheons (2002).

Dungeons & Dragons 4th edition (2008-Present)
Grumbar appears in the fourth edition as a primordial.