Scortax's page

Shape Change is on page 172, under the abilities that an Intelligent Legendary Item can be given.

Read Magic
Shape Change
Skill Ranks

almost missed it myself

From the description, i'd say it works like the Glameredpower for magical Weapons, except that the change is real, rather than an illusion.

Ok new question, what kind of things would you have a large sized boulder of adamantine change in to?

At work. Will when I get home

One of the abilities listed is shapechange. Into something of its size.

I also want it to talk. And have its own movement.

So, I want to take legendary item while doing mythic jade regeant. One of the abilities the item can get is shapechange. Does anyone have experience with this? How does it work? Can it's alternate form be a creature? What are its limitations?

My idea is for a barbarian that is taking the hurler archetype and rage powers. He basically is going to carry around a large adamantine boulder. I want this boulder to become a legendary item. Then thought about the shapechange ability it could get. Any suggestions or advice?