Burning Horizon

You conjure a pocket dimension that mimics the burning skies and earth of the domain of a god of ambition and flame. The pocket dimension appears in a 100-foot radius around you, and any creatures within this area of effect take 10d10 fire damage at the start of their turn as they are seared by the intense heat. Additionally, all fire damage dealt within the pocket dimension is maximized, and all cold damage is nullified.

While concentrating on the spell, you can use a bonus action on each of your turns to move the pocket dimension up to 30 feet in any direction.

The intense heat of the pocket dimension can induce exhaustion in creatures that spend too much time within it. At the start of each creature's turn within the pocket dimension, they must make a Constitution saving throw. On a failed save, the creature gains one level of exhaustion.

The intense nature of the spell also puts allies at risk, and any creature that starts its turn within the pocket dimension that isn't under your control must make a Dexterity saving throw. On a failed save, they take 10d10 fire damage.