Ephoris' Plasma Bolt

A massive artillery weapon appears nearby and fires a devasting blast of energy. Choose one creature you can see within range. The target must succeed on a Dexterity saving throw and on a fail takes 3d10 lightning damage and 3d10 force damage. In addition, the target is knocked prone and is pushed 50ft away from you. On a successful save the target takes half damage, is not knocked prone, and is not pushed.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the lightning or force damage increases by 1d10 for each slot level above 4th.