Apple Pie's Derpshot

With the mighty word "Derp," you send a shrieking and laughing spectral derp face surging at a foe within range. They must make a Charisma saving throw or take 1d8 psychic damage as they reel from the horrific experience of being derped. Additionally, their next attack roll suffers disadvantage as when they try to swing, an annoying voice shouts "Derp!" in their mind.

   This spell's damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).