Grumbar

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

Worshipers
The church of Grumbar is organized into small sects known as Holds, each comprising seven clerics, seven monks, and seven rangers and as many laity as can be supported. Those who follow the Earthlord can 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 is called one of the cold gods of the elments. As those are seen as uncaring for human affairs, they are considered opposed to the Land of Fate's pervasive culture of Enlightenment. Only a few Zakharans are willing to worship a cold god in order to gain power.

Relationships
Grumbar has ties with the deities with ties to elemental earth, including Geb, Garl Glittergold, Dumathoin, Laduguer, and Urogalan, but these are loose at best. Grumbar is opposed to Akadi and her flimsy and ever-changing ways. In the battle of the archomentals of Sunnis and Ogremoch, Grumbar secretly balances one against the other, remaining the most powerful ruler of elemental earth himself.

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.