Blade of the Storm Wind

Weapon (any sword), uncommon (requires attunement)

You gain a +1 bonus to attack and damage rolls made with this magic weapon.

While holding the sword, you can use an action to create a wave of slicing wind, forming a line 5 feet wide and 30 feet long that extends out from you. Make a melee weapon attack against each creature in the line, with an attack bonus equal to your Strength or Dexterity modifier (your choice) plus your proficiency bonus. On a hit, a creature takes damage from the sword plus 1d8 thunder damage. In addition, the wave clears any gas, vapor, or effects that would be dispersed by a strong wind. This property can’t be used again until you take a short or long rest while attuned to the weapon.