Excalibur

You summon a blade of air that hurls through a 60ft line that is 10ft wide. All creatures in the line must make a dexterity saving throw or take 6d10 slashing damage plus 4d8 thunder damage and be knocked back 10ft from you and cannot fly until the end of its next turn, unless it can hover. On a successful save the target takes half damage and suffers no other effects.
At Higher Levels:
When you cast this spell with a spell slot of 7th level or higher the slashing damage increases by 1d10 and the thunder damage increases by 1d8 for each level after the 6th.