Martial Artist (Snake Style)

Practitioners of Snake Style internalize the sinuous  movements and deadly counterstrikes of serpents.  Students of Snake Style are taught a philosophy that  encourages patience and asceticism. 

Snake Stance. While you are in this stance you gain  +2 AC if you are not holding a weapon or a shield. 

Snake Bites the Heel. When an adjacent creature  misses a melee attack against you while you are in  Snake Stance you can use your reaction to make an  unarmed strike attack against that creature.