Venomous Strike

The next time you hit a creature with a weapon attack before the spell ends, the target struck must succeed on a Constitution saving throw or else be Poisoned for the spell's duration. While Poisoned by this spell, the target takes 1d8 points of Poison damage at the start of each of its turns. The afflicted creature may repeat its saving throw at the end of each of its turns, on a success the spell ends early. When casting this spell using a spell slot of 2nd or higher, the damage taken each turn increases by 1d8 for each spell level above 1st.