Wall of Fire

Casting Time: 1 action
Range: 120 feet
Duration: Concentration, up to 1 minute
You create a wall of fire on a solid surface within
range.
When the wall appears, each creature within its
area must make a Dexterity saving throw. On a
failed save, a creature takes 5d8 fire damage, or
half as much damage on a successful save.
See PHB, pg. 285.