Tri-Cast

As you clap your hands together, a thin sheet of flames, ice and lighting shoots forth from your outstretched fingertips. Each creature in a 15-foot cone must make a Dexterity saving throw. A creature takes 2d6 fire, 2d6 cold and 2d6 thunder damage on a failed save, or half as much damage on a successful one.

The fire ignites any flammable objects in the area that aren't being worn or carried. The cold reduces the targets movement by half.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d6 in one damage type for each slot level above 1st.