Originally Posted by Heretic
Actually, she states in the movie that Xavier can't get to her while she's in diamond form. Turning to diamond would have protected her from Xavier, and the fire and debris. There is no other moment in the film where her diamond would have come in more handy, and she didnt use it.
They could have eliminated the diamond form altogether and saved the 4 dollars they spent on making that effect look so awesome.
Yeah but if she shifted into diamond form, her block on Xavier would not have held anymore. She needs to be in human form to keep her telepathy active.