Beam of Frost

A 5-foot-wide, 60-foot-long beam of frigid blue-white light shoots forth in a straight line. Creatures caught in the beam take 2d8 frost damage and have their speed halved until the end of their next turn. A successful Dexterity saving throw reduces the damage by half and prevents the speed reduction.

At Higher Levels. The spell's damage increases by 1d8 for each spell slot level above 2nd.