Controlled blast

As you hold your hands shoulder width apart in the direction you intend to aim, two thin bursts of flame erupt from the palms in two 20ft lines (within a 5ft width). Creatures within the line must secede in a Dexterity saving throw or be pushed to the end of the 20ft line. Regardless of saving throw success all creatures within the line take 1d6 fire damage. Alternatively the caster may propel themselves 20ft in the opposite detection of the casting. The spell last for 2 rounds, after which at the end of the casters turns the lines will sputter out. Any creatures still within the line or enter the line will take 1d6 fire damage and must secede a Dexterity saving throw or be pushed to the end of the 20ft line.