You slide your hand along the side of the weapon, and the blade becomes instilled with poison. You then make a melee attack with that weapon against one creature within 5 feet of you. A creature hit by the weapon for the duration takes an additional 1d6 poison damage. If you hit a creature multiple times with the same weapon, that creature must make a Constitution saving throw each time it is hit or become poisoned for the duration. A creature poisoned in this way can make another Constitution saving throw to resist the poison at the end of each of its turns.

This spell's extra damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).