The earth is an element that can be defined as the world.
Denizens of the Cosmos
Elementals are manifestation of volatile energies. Without power to keep their raging spirits bound to the physical world, elementals can - or do - dissipate and bleed back into the earth.
Infernals are fel constructs composed of earth and fire. Falling to earth as green, molten meteorites, infernals exist only to destroy every living thing in their path.
The titans are godlike beings composed of the primordial matter from which the universe was born and were uniquely susceptible to fel magic.
Professions of the Cosmos
Shaman magic draws its power from the natural world and the elements of the earth. Powerful shaman can rouse the earth itself to devour legions of their enemies. Far Seers represent the pinnacle of shamanistic power. They are not only tied to the elements of the earth and sky, but are also adept at foretelling the future. Part of the Far Seer's power over nature is the ability to command the fury of the earth. When roused, farseers can cause the earth to quake violently. They claimed they could sense the life force in earth and seemingly dead stone.
WarlocksPractitioners of the warlockian beliefs, warlocks are binders of demons who command the fel powers that hold control over the infernals, fel constructs composed of earth and fire.
Resources of the Land
Mined from the rich earth of Azeroth and Lordaeron, gold is a precious metal that is commonly used in exchange for goods and services.
This building pulls fresh corpses from deep within the earth, exhuming them for use by the vile necromancers.
Those who hold such sacred bonds with the Earthmother can actually be reincarnated.