Venomous Strike

The next time you hit a creature with a weapon attack before this spell ends, a sickly poison spreads from the point of impact, and the target must succeed on a Constution saving throw or be paralyzed until the start of your next turn. A Large or larger creature has advantage on this saving throw. If the target succeeds on the save, the poison fades away.
At Higher Levels. If you cast this spell using a spell slot of 2nd level or higher, the target takes an additional 1D6 poison damage per level.