Inner Beast is a skill located in the Undaunted (which can be found in the Guild skill tree). Inner Beast is a morph of Inner Fire
Inner Beast deals the following types of damage: Magic Damage, Physical Damage. Which means that it gets buffed by the following blue champion point trees: Elemental Expert, Elf Born, Mighty, Piercing, Precise Strikes, Spell Erosion, Thaumaturge. Also the following red champion point trees protect against this skill: Elemental Defender, Hardy, Thick Skinned.