Massive, venomous fangs spring from your mouth. Make a melee spell attack against a target within your reach. On a hit, the target takes 3d8 poison damage, and the target must make a Constitution saving throw. If they fail, they are poisoned until the start of your next turn. Until the spell ends, you can make the attack again on each of your turns as an action. When you do, you can make a single melee weapon attack as a bonus action.