Booming Blade

As part of the action used to cast this spell, you
must make a melee attack with a weapon against
one creature within the spell's range, otherwise
the spell fails.
On a hit, the target suffers the attack's normal effects, and it becomes sheathed in booming
energy until the start of your next turn. If the
target willingly moves before then, it immediately
takes 1d8 thunder damage, and the spell ends.
This spells damage increases when you reach
higher levels.