Elemental Archer's Improved Elemental Storm

Type of feat: Class, Elemental Archer
Prerequisite: Elemental Archer 5
Required for: None
Specifics: The elemental storm becomes a raging conflagration of energy. The damage bonus increases to the damage is 2d8 + (HD/2)d6 and the number of targets increases to 10.
Use: Selected

A number of d6 rolls equal to half your current hit dice which maxes at 15d6, hence max damage is 2d8 + 15d6 per target.