Titan ball

You create a spinning ball of white hot steel fragments at a point within range. The ball gets hotter and hotter until it explodes, spraying metal shards everywhere. Each creature in a 120 foot circle radius must must make a Dexterity saving throw or take 6d6 slashing damage plus 2d6 fire damage on a failed save or half as much damage on a successful one. You can control the radius of the sphere so it moves further by cutting out quarters of the circular radius. (For example you could only cover half the radius and that radius would be doubled or a quarter it would be quadrupled)