Viper Strike

As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell’s range, otherwise the spell fails. On a hit, the target suffers the attack’s normal effects, and it makes a Constitution saving throw poising on a failure. The target then takes 1d8 poison damage on each of its turns. The target may repeat the save at the end of each of its turns ending the effect on a success.

This spell’s damage increases when you reach higher levels. At 5th level, the melee attack deals an extra 1d8 poison damage to the target, and the damage the target takes from poisoning increases to 2d8. Both damage rolls increase by 1d8 at 11th level and 17th level.