Draconic Enlargement II

At 15th level, and every 10 levels thereafter, the dragon disciple's size increases by one step (such as from Large to Huge), to a maximum of Colossal size. The change in size affects the dragon disciple's base natural weapon damage. Apply the appropriate new size modifier to the character's attacks and AC. It may also change Strength, Dexterity, and Constitution as appropriate for the new size (dependent on PRC_DRAGON_DISCIPLE_SIZE_CHANGES switch).