Elemental Resistance is a special Resistance that combines Fire Resistance, Lightning Resistance and Cold Resistance into one value. An item with "10% Elemental Resistance" adds +10% to Fire, Lightning and Cold Resistance. Some of the skills provide Elemental Resistance to the hero and/or his pets: * Nature Mastery: Permanence of Stone adds Elemental Resistance to the Heart of Oak aura * Defense Mastery: Defiance adds temporary Elemental Resistance to the Rally buff * Earth Mastery: Metamorphosis adds Elemental Resistance to the Core Dweller pet