Poisonous Fangs

Your head transforms into the head of a snake.  You gain the following benefits

1:  You can use your bite as a unarmed strike.  When you do so, you can use Dexterity, instead of Strength, for the attack and damage rolls

2:  Once per turn, when you hit a creature with your bite, you can deal 1d6 extra poison damage with it.

3:Once per short rest, you can use your bite as a bonus action.  When you use it this way, you gain a number of temporary hit points equal to the damage dealt plus your constitution modifier (minimum +1).