Rock Throwing

This creature is an accomplished rock thrower. A creature can hurl rocks up to two categories smaller than its size; for example, a Large Giant can hurl Small rocks. A “rock” is any large, bulky, and relatively regularly shaped object made of any material with a hardness of at least 5. The creature can hurl the rock up to five range increments. The size of the range increment varies with the creature.

Additionally, when throwing a rock of at least Small size, the creature with this ability may increase the DR of the rock by an amount equal to it's Strength modifier.