Virulent Strike

You brandish the weapon used in the spell’s casting and and infused the next strike with virulent poison.  Until the end of your turn the next time you damage a creature with a melee attack you deal an extra 1d6 poison damage.

This spell’s damage increases when you reach certain levels. At 5th level, the melee attack deals an extra 1d6 poison damage to the target on a hit (2d6), and the damage rolls increase by 1d6 at 11th level (3d6) and 17th level (4d6).