Arcane Cascade

You unleash a torrent of raw arcane energy that cascades across the battlefield. Choose up to five creatures or objects within range. Each target must make a Dexterity saving throw. On a failed save, the target takes 6d6 force damage, 4d6 radiant damage, and is knocked prone. On a successful save, the target takes half damage and is not knocked prone.

As the energy explodes, it leaves behind an ethereal echo of magic. For the next minute, the area within 10 feet of where each target was hit becomes difficult terrain as remnants of the arcane cascade linger, shifting the air and ground with residual magic.

At Higher Levels: When you cast this spell using a spell slot of 6th level or higher, the force damage increases by 1d6 for each slot level above 5th.