Birth sign: The Serpent

Ability Score: +1 to dexterity or constitution 

Passive: Serpent Skin

Gain resistance to poison

Active: Satakal's bite

Deal poison damage to an enemy and they have make a constitution saving throw to not become parlayed 

Drawback — Scale molting 

You can't regain anything from a short rest (a long rest is the only way to regain everything, unless affected by spells or potions)