Bombardment

You throw 3 pieces of ammunition up into the air, and then they grow into larger turning into mortar shells and fly to 3 different locations within 120ft of you, you choose 3 spaces with 120ft and each creature within 10ft of that point must make a Dexterity Saving Throw on a fail takes 6d8 Fire Damage and is knocked Prone, on a pass they take half damage and are not knocked Prone. A Creature canot be effected by more than 1 of these areas.