Bijuu-Dama

Casting this spell requires a Full Round Action

With the glass sphere on your hands, you channel your arcane magics into it. After charging, you discharge it towards a point within 120 ft. All creatures within 30 ft of the impact zone take 12d6 force damage. Dexterity save to half the damage. The area hit by this spell is considered difficult terrain

Heightened Level: Casting this spell using a spell slot lv 7 or higher, add an additional 3d6 damage per spell slot above 6