Fell Onslaught

A death by one thousand cuts is still a death, painful as it is to see.
The first time you take the Attack action during your turn, you can cast this spell to make your weapon glow with eldritch power and cleave the fabric of reality with every swing. The first time you hit during this turn, your attack inflicts an additional 2d10 force damage, and the target becomes afflicted by a malignant curse. Until the spell ends, whenever you take the Attack action, you can choose to attack the cursed creature regardless of distance or obstacles, and these attacks deal an additional 1d10 force damage, ignore cover, and cannot suffer disadvantage.