Fire Potency, Greater (3.5e Spell)

As soon as the spell is activated you gain the ability to project deadly fire bolts as an attack action at long range. Each firebolt require a ranged touch attack using your primary casting ability score for attack instead of dexterity and deal 1d8+1 fire damage per 2 caster level you have (rounded down).

As a swift action you gain additional options for your firebolts:
 * You may lower the damage dices by 2d8+2, doing so allow you to deal hellfire damage with your firebolt and all your [fire] spell.
 * You may increase your firebolt's dice size to 1d10+1, doing so end the spell at the end of the encounter.
 * You may double the damage dices, doing so end the spell at the end of the round.
 * You may lower the lower the damage dices by 1d8+1, doing so allow you to make an additional attack per round with your firebolt. Although all attacks made that round will have a -2 penalty.