Venomous Strike

The next time you hit a creature with a weapon attack before this spell ends, your weapon glows an unsettling green, and the attack deals an extra 3d10 poison damage to the target. Additionally, the target must succeed on a Constitution saving throw or be poisoned until the spell ends.

A creature poisoned by this spell makes another Constitution saving throw at the end of each of its turns. On a successful save, it is no longer poisoned.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the extra damage increases by 1d10 for each slot level above 3rd.