Viper Strike

You turn your arm into a viper which strikes at a target you can reach. Make a melee spell attack against the target. On hit the target take 4d6 poison damage. If the target is a creature is must make a Constitution saving throw against your spell save DC. On a failed throw the creature is poisoned for one minute. The creature can repeat the save at the end of its turn.

At Higher Level. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 for each slot level above 2nd.