Volcanic Eruption

Choose a point you can see on the ground within range. A blast of boiling magma erupts in a 20-foot cylinder centered on that point. Each creature in that area must make a Dexterity saving throw. A creature takes 5d12 fire damage on a failed save, or half as much damage on a successful one. Additionally, the ground in that area becomes covered in patches of liquid rock. The area is difficult terrain, and any creature moving through the affected space takes 1d6 fire damage for every 5 feet it moves through the affected space.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d12 for each slot level above 5th.