Divinity 2 help??????

I have the game for the 360 my problem is gettn to turn into the dragon were do i go to recieve these powers ive defeated the dragon in maxo's temple etc nw im at this island trying u hire ppl bt ive to climb this tree thing which has a boat on top of it bt i need to be in dragon form to reach it and i dno were to go to become this dragon help plz!!