PHB: P. 271
Ray of Sickness
1-level Necromancy
Casting Time: 1 action
Range/Area: 60 feet
Components: V, S
Duration: Instantaneous
A ray of sickening greenish energy lashes out toward a creature within range.
Make a ranged spell attack against the target. On a hit, the target takes 2*D8 poison damage and must make a Constitution saving throw. On a failed save, it is also poisoned until the end of your next turn.
At higher levels: When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1*D8 for each slot level above 1st.
Available for: Artificer (Alchemist), Sorcerer, Wizard