So we are looking at something along the lines of:
So much for taking damage 9/die 4hd [72 pts]
Defends[Self]
Extras and Flaws: Radius +2, Controlled Effect +1, Interference +3, Duration +2, If/Then(must be able to gesture and speak) -1
Gives all allies within 30 ft 4hd of Interference this lasts for the entire battle, Good luck.
Of course there are nullify and interference powers to reduce the effectiveness of the defense but that is a pretty awesome power all things considered.