Temporal Blast

You unleash a bolt of temporal energy towards a creature within range. Make a ranged spell attack against the target. On a hit, the target takes 2d8 force damage. If the target is Large or smaller, its speed is reduced by 10 feet until the start of your next turn as it becomes momentarily displaced in time. 

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