Daeron's Strike of Sloth

Combining the study of Chronomancy (Chronurgy) and Bladesinging you begin to hum with the frequency of time itself, and you imbue the magic of time into your next weapon attack.

The next creature you hit with a melee weapon attack with this weapon takes an additional 2d6 of slashing or piercing damage, and must make a Wisdom saving throw or be affected by this spell until the start of your next turn.

An affected target’s speed is halved, it takes a -2 penalty to AC and Dexterity saving throws, and it can’t use reactions. On its turn, it can use either an action or a bonus action, not both. Regardless of the creature’s abilities or magic items, it can’t make more than one melee or ranged attack during its turn.