Beam of Steam

A scorching beam of blue-white steam streaks toward a creature within range. Make a ranged spell attack against the target. On a hit, it takes 1d8 fire damage. The target must succeed on a dexterity saving throw or it will be pushed back 10 ft and knocked prone. Upon a save, the creature is not knocked back or prone.

Creatures made of fire that would normally have immunity or resistance to fire damage don't, in the case of this spell (heat/steam damage).

The spell’s damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).