Necromancy
Level: 1st
Casting Time: 1 action
Range: 60 feet
Components: V, S
Duration: Instantaneous
Actually, a ray of sickening greenish energy will be lash out towards a creature within a range. Against the target make a ranged spell attack. On a specific hit, the target will take 2d8 poison damage and also must make a constitution saving throw. But on a failed save, it is also be poisoned until the end of your next turn.
At Higher Levels: Whenever you cast this spell by using the spell slot of the 2nd level or else higher and the damage will be increase by 1d8 for each slot above the 1st level.