You move at lightning speed. Until the end of your turn, your movement doesn’t provoke opportunity attacks.

Once before the spell ends, you can give yourself advantage on one weapon attack roll on your turn. That attack deals an extra 1d8 Force damage on a hit. Whether you hit or miss, your walking speed increases by 30 feet until the end of that turn. As you start moving a sudden loud ringing noise erupt from you. Each creature in a 10-foot-radius sphere centered on that point must make a Constitution saving throw. A creature takes 1d8 thunder damage on a failed save, or half as much damage on a successful one. A creature made of inorganic material such as stone, crystal, or metal has disadvantage on this saving throw.

This spell most be use before doing any movement.