Charge Blast

You charge up energy from around you and store it in your body. When the spell ends, either because your concentration is broken or because you use an action to fire it, the energy shoots to a point of your choice 120 feet away and blossoms into an explosion of force that spreads around corners. Each creature within a 20-foot-cube sphere centered on that point must make a Dexterity saving throw. A creature takes force damage equal to the total accumulated damage on a failed save, or half as much damage on a successful one.

The spell's base damage is 5d6. If at the end of your concentration has not yet been broken, the damage increases by 5d6.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the base damage increases by 1d6 for each slot level above 3rd.