With that roll, I'm just going to assume that I don't know what these are.
With the strange creatures apparently unfazed by their attacks and Berin eerily enraptured by their shrill cries, Lukas begins to panic. His resistance to saidin's call collapses, and---with only a small corner of his mind worrying that his companions might notice---weaves the most ferocious fireball he can muster.
Not sure how many enemies we're dealing with, or where they're positioned. The fireball should be aimed so as to hit as many as possible without hurting Berin.
Reflex save of 17 for half damage.