Volcanic Orb

You evoke the flames of the deepest volcanoes at the palm of your hand, then, condensing it into a powerful orb of magma and strike it with full force at the ground. Each creature in a 60-foot-radius centered on you makes a Dexterity saving throw. A creature takes 10d6 + 20 Fire damage, are knocked 10 feet away from you in a straight line and are left prone on a failed save or half as much damage only on a successful one.

When the orb explodes, flammable objects that aren’t being worn or carried and creatures that are not immune or resistant to fire damage in the explosion start burning.

Using a Higher-Level Spell Slot. The damage increases by 1d6 for each spell slot level above 7.