Aralius' Incendiary Hyrda

You summon spectral, flaming hydra heads in the space just in front of you (mechanically, the square you are on). The Hydra has three heads and each head breathes a 20ft line of flame in any direction around you. Each target affected by the fire must make a Dexterity saving throw, taking 8d6 fire damage on a failed save, and half as much on a success. Then, the hydra heads dissipate.

At Higher Levels. When cast at higher levels, the spell deals an additional 1d6 damage for each spell slot level above 3rd.