Blightclaw

You slash at a target with a claw of greenish-black energy at a target within range. Make a melee spell attack against the target. On a hit, the target takes 1d6 poison damage and is poisoned until the start of their next turn.

This spell's damage increases by 1d6 when you reach 5th
level (2d6), 11th level (3d6), and 17th level (4d6).