Air Slicing Blade

you infuse a weapon you are wielding with a whirling gale of wind. u until the spell ends the infused weapon has the reach property. before the spell ends you can forgo an attack to instead release a 15 ft long, 5ft wide line of air in a direction you choose. each creature in that line must make a dexterity saving throw. on a failed saving throw the creature takes 1d12 slashing damage. 

At higher levels. when you cast this spell with a spell slot of level 2 or higher, the slashing damage increases by 1d8 for each level above 1st.