Alfred's steaming Cone of Acid

A blast of hot, steaming Acid erupts from your hands. Each creature in a 40-foot cone must make a Constitution saving throw. A creature takes 8d8 acid damage and is on fire on a failed save, or half as much damage and is not on fire on a successful one.

At the beginning of a burning creatures turn it takes 2d6 fire damage. Any creature can use it's action to douse the flames.

A creature killed by this spell becomes a puddle of steaming acid.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d8 for each slot level above 5th.