Surge Step

Your movement speed for one round doubles and as you move a trail of lightning follows you that remains for that round. Attacks of opportunity have disadvantage against you as you move at high speed. Each creature that attempts to pass through your trail of lightning must succeed a Dexterity saving throw against your spell save DC or take 4d6 lightning damage, taking half on a successful save. Creatures who end their turn in the trail automatically fail the Dexterity saving throw and take full damage.

At Higher Levels. You gain an additional 10ft. of movement and an additional 1d6 of damage for each spell slot you use above 3rd level.