Brimstone

 A 1 foot wide beam of energy is exhaled via the mouth by the caster for about 500 feet for as long as the caster uses it, dealing 10d10 fire/force damage every round, however the caster is drained of 1d4 health every round, and the beam will fire until the caster ends the spell.

Gains additional 5d10 damage when casted at a higher level, the health cost also increasing to 1d6 and increasing by an additional 1d6 per higher spell level, the width of the spell also increases by 1 foot per higher spell level.