Cruel Sun

You form a ball of flames hovering above your pointer finger and force it forwards. Any creature in its path must make a DC 13 DEX saving throw or take 3d8 fire damage and be pushed back 10 ft, half damage on a success. 
You can also charge the flames for an additional turn increasing the damage by 2d6 and release it as your bonus action. 
Any attack you receive while charging the flames forces you to succeed on a concentration saving throw or the spell dissipates.