Video preview of Emma Frost, which is a guest char in Avengers United Battle force.
She has a normal mode (where she can use her psychic powers) and Diamond Form mode, where she can’t use her normal powers, but gets many benefits: more power, more defense, new moves and a super armor. Sprites by Ens23.

See her in action here: http://www.youtube.com/watch?v=n8VlL5LTem0