Stone, sand, mud, and soil. Earth mages are hardy, able to increase their Damage Resistance when they cast spells, and can fling chunks of earth and stone around to bash their enemies and litter the battlefield with Difficult Terrain. Their weaknesses are their relatively low mobility, their lack of healing spells, and the fact that all of their spells deal physical damage, which can run into problems when they face an enemy with Damage Resistance (Physical).