Dungeons and Dragon Ball (Ver. O.1.2)

You create a devastating wave of energy that surpasse normal spells at the cost of your vitality. You gain two levels of exhaustion, or only one if you already have at least one level. Additionally, you take an amount of necrotic damage equal to twice this spell's level. Every creature within a 20-foot cube originating from a point you choose within range must make a Dexterity saving throw. On a failed save, they take 5d10 + 20 force damage and are pushed 20 feet away from you. A pushed creature that impacts a solid surface is stunned until the end of your next turn. On a success, they take half as much damage, are not pushed, and can instantly use their reaction to move up to their speed to the nearest unoccupied space outside of the spell's area. At Higher Levels: When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d10 for each slot level above 5th.