Venomous Claw is a skill located in the Ardent Flame (which can be found in the Dragonknight skill tree). Venomous Claw is a morph of Searing Strike.
Venomous Claw deals the following types of damage: Poison Damage. Which means that it gets buffed by the following blue champion point trees: Mighty, Piercing, Precise Strikes, Thaumaturge. Also the following red champion point trees protect against this skill: Hardy, Thick Skinned.