Vengeful Comets

You conjure a number of miniature comets of ice (up to one per four caster levels) to orbit around you, granting you a circumstance bonus equal to the number of comets on all saving throws against fire effects. Once per round when you are affected by a spell cast by an enemy, you fire one of your comets in retaliation. This is a ranged touch attack that deals 1d6 points of bludgeoning damage and 3d6 points of cold damage + 1 point of cold damage per two caster levels (maximum +10). If the spell you're retaliating against had the fire descriptor, you fire one additional comet.

Damage

1d6
Minimum1
Average3.5
Maximum6
3.516

One effect before extra caster bonuses and target defenses. Separate effects are not added together.