Under Humaniod -> Knowledge -> Martial Arts -> T2 there's a listing:Animal Forms Xpts: Animal Forms 2, Class Trait Only (Level 3+)How much is the X supposed to be?
Animal Forms X: This ability allows a model to select X traits
from a Biest Kingdom of choice. These additional traits
are combined into a single trait. The point cost of the Trait
equals the total cost of the Traits chosen.
So the cost X is the sum of the 2 Biest Kingdom traits you pick