Arcane Explosion

You create a shimmering blast of arcane energy from within yourself. Creatures within range of the explosion must make a Constitution saving throw. On a failed save the creature takes 3d8 force damage, and half as much damage on a successful one. If a creature fails by 5 or more, their speed is also halved until the end of your next turn.

Objects in the area take the same damage, and are knocked 5 feet away from you if they are size Medium or smaller.

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