Needs review
Source: Encyclopedia Arcane: Dragon Magic

Description: You can cover a larger area with your cone and ray spells.

Prerequisites:

The caster turns his hands as he releases a ray or cone spell, targeting more creatures with it.

It starts with the furthermost target and, for every additional target outside the ray or cone’s normal effect he wants to hit, all targets enjoy a +2 dodge bonus to their saving throws. The caster decides how many additional creatures he wants to target, and the targets cannot be outside a 180o arc in front of him. A strafing spell uses up a spell slot one level higher than the spell’s actual level.