Apophis Lamia

While the Apophis are the smallest of the Lamia species, they are also among the most nimble of their kin thanks to their slender and slithering bodies. But one should not take them as weak, for they possess a potent natural venom.

Bite. Your fangs are natural melee weapons that have the finesse trait, which you can use to make unarmed strikes. If you hit with them, you deal piercing damage equal to 1d4 + your Strength or Dexterity modifier, instead of the bludgeoning damage normal for an unarmed strike.
Venomous. You have the ability to secrete venom from your fangs. When you hit a creature with an attack using your fangs, you can choose to inject venom into the creature. The creature must make a Constitution saving throw. On a failed save a creature takes poison damage equal to an amount of d6 equal to your proficiency modifier. On a successful save a creature takes half as much damage. The saving throw is 8 + your proficiency bonus + your Constitution modifier. Alternatively you can use an action to mix your venom with your saliva to create poison. Your poison is an ingested and injury type poison. A creature subjected to your poison treats it as if you injected your venom into the creature.
Once your poison leaves your mouth, it remains potent for one hour. You are immune to your own poison. Once you secrete venom, you can’t do so again until you have finished a short or long rest.
Slithering Body. You gain proficiency in Performance or Stealth.