Sekrath (5e Race Variant)
From D&D Wiki
The sekrath are a specialized form of yuan-ti made by the sarrukh. Developed with cobra heads, they were modeled to have more strength and dexterous bodies for powerful melee rather than cunning for spellcasting. In fact, they were meant to be foot soldiers of the spellcasting yuan-ti type. They have powerful jaws that can unhinge and bite to inject poison, as well as soldier training in the art of weaponry.
This race variant replaces the Ability Score Increase and Innate Spellcasting traits. You gain a different Ability Score Increase, Yuan-ti Fighter, and the Poison Bite trait.
Poison Bite. Your fanged maw is a natural weapon, which you can use to make unarmed strikes. If you hit with it, you deal poison damage equal to 1d6 + your Strength modifier, instead of the bludgeoning damage normal for an unarmed strike.