Booming Blade

A weapon
You make a melee weapon attack with the
weapon. On hit, normal damage and target
becomes sheathed in booming energy until the
start of your next turn. Moves willingly before
then, takes 1d8 thunder damage, and spell ends.
At higher level
At 5th level, the attack deals 1d8 thunder damage
extra, moving damage increases to 2d8. Both
damage rolls increase by 1d8 at 11th level and
17th level.