Crippling Force

You choose a creature that you can see within range and surround them in debilitating magic that causes them to seize up when you attack them. Until the spell ends you gain a +1 bonus to attack rolls you make against the creature and deal an extra 1d6 force damage when you hit it with an attack. Additionally, once per turn when you hit the creature, you can reduce the creatures movement speed by 10 feet until the start of your next turn. If the target drops to 0 hit points before this spell ends, you can use a bonus action on a subsequent turn of yours to effect a new creature.

At Higher Levels. When you cast this spell using a spell slot of 3rd or 4th level, you can maintain your concentration on the spell for up to 8 hours. When you use a spell slot of 5th level or higher, you can maintain your concentration on the spell for up to 24 hours.