Big Bang Attack

You target a creature in range, make a spell attack roll at the creature, upon a hit you do 3d8 + your spellcasting ability modifier in force damage. Regardless of weather or not you hit, the creature and every creature within 10 feet of it makes a dexterity save against your spell save DC, all creatures that failed take 2d12 force damage and no damage on a successful save.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage (both initial and explosion) increases by 1d8 and 1d12 for each slot level above 2nd.