Thermal Convergence

A spiraling beam blasts from your pointing finger to a creature you choose within range and then pulls in heat from nearby creatures to bombard it. Each creature in a 30-foot-radius sphere centered on that point (except the targeted creature) must make a Constitution saving throw. On a failed save, each creature takes 1d4 cold damage, and half as much damage on a successful save. The targeted creature must make a Constitution saving throw. On a failed save, the target creature takes 1d4 fire damage for each creature with a 30-foot-radius sphere centered on itself, and half as much damage on a successful save. If you target a creature with this spell that is not within 30 feet of any other creatures, this spell does nothing.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, both the fire and cold damage increase by 1d4 for each slot level above 1st.