Arcane Sphere

Mages body pulses with pure arcane energy sizzling with tension, a sphere grows in his hand giving off a bright purple aura with a warm blue inside. Once the sphere is about 3ft in diameter it is released at high speed. Each creature in a 30-foot-radius sphere centered on that point must make a Intelligence saving throw. A target takes 10d6 force damage on a failed save, or half as much damage on a successful one.