Does anyone know what page specifically? I am looking through our book and its not covered under the benifits of being coelesced or under the Thunder lizard benifits. Its not in the Thunderquake Description or on the actual warscroll itself. So why is everyone saying they can be battleline? Im not seeing it in the book.
Check the back of the book for point allocation under Steggadon. It should say battleline if part of Thunderlizard's constellation.
that's where they always put exceptions to battle roles. like guard being battleline if in a Seraphon allegiance etc.