Venomous Injection

You imbue your hand with a bubbling layer of deadly poison. Make a melee spell attack against a target. On a hit, the target suffers 1d6 poison damage and must succeed on a Constitution saving throw or be poisoned for 1 minute. If the target is not at its hit point maximum, it takes an additional 2d6 poison damage. The target can repeat the Constitution saving throw at the end of each of its turns, ending the poisoned condition on a success.