Tasha's Cauldron of Everything, pg. 115
Tasha's Caustic Brew
1-level Evocation
Casting Time: 1 action
Range/Area: self, 30' line/5' wide
Components: Verbal, Somatic, Material
Materials: a bit of rotten food
Duration: Concentration, up to 1 minute
A stream of acid emanates from you in a line 30 feet long and 5 feet wide in a direction you choose. Each creature in the line must succeed on a Dexterity saving throw or be covered in acid for the spell's duration or until a creature uses its action to scrape or wash the acid off itself or another creature. A creature covered in the acid takes 2d4 damage at the start of each of its turns.
At higher levels: When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 2d4 for each slot level above 1st.
Available for: Wizard, Sorcerer, Artificer