Corrosive Armor

Corrosive Armor is a Dragonknight Class Ability, found in the Earthen Heart Skill Line.

Corrosive Armor
200 Ultimate Target: Self Base Skill: Magma Armor
Oxidize the green dragon blood in your veins, limiting incoming damage to 3% of your Max Health and dealing 347 Poison Damage to nearby enemies each second for 10 seconds. While active, this ability and your Direct Damage dealt ignores enemy Physical and Spell Resistance.

Corrosive Armor is a morph of the Magma Armor base skill. The other morph is Magma Shell.