Titan's Malefic Machinations

Make a ranged attack with a crossbow, a sickly green bolt streaks toward a target within range. Spell ignores loading property. On a hit, the target takes weapon damage +2d6 as Poison Damage. The target must make a Constitution saving throw, on a failed save it is poisoned and takes 2d6 Poison Damage at the start of each of its turns for the duration. The creature may make a Constitution Saving throw at the end of each of its turns to end the effects. 

 At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 weapon and poisoned damage for each slot level above 2nd.