You’re a Gnoll, Flind, Kobold, Canine-Like,Feline-Like, Bear-Like or similar humanoid with sharp dangerous teeth (usually 1d3 + Str or Dex mod.)  Your skill in using a bite attack has vastly surpassed your peers.

Battle Bite is an additional attack that is free as part of your melee attack action.  It can be directed at the same target as the Melee attack or another target within 5' of you.

* You can used your additional bite attack WITH ADVANTAGE IF you are within 5' of an opponent that you have already hit in a PREVIOUS TURN.

Attack of Opportunity:

* You may use your Battle Bite during any attack of opportunity as an additional attack on the same target, or wait and use the Battle Bite as a possible second attack of opportunity against any other target drawing an attack of opportunity in the same round.  The target must be subject to attacks of opportunity with a range of 5'

Sneak Attacks

* Battle Bite may be added to any sneak attack or situation where the biter has advantage during the attack.  In the case of sneak attack, the bite attack is rolled separately and can crit on a 20. 

As a Reaction

* At 3rd Level Battle Bite can be used as reaction if not used in the Current Turn.  In this case the Bite can be directed to thwart any Magical or Non-Magical Melee or Non-Magical Missile attack by defensively biting at the wielder or the weapon (whatever makes the most sense).  In this case the Bite will add 1d3 to the biter's AC.  The AC boosting Die Roll is made AFTER the attack roll.

Additional Use Practices:

* Battle Bite man NEVER be used to amount for two or more bites in the same turn.

* Battle Bite does not cost an action or bonus action to use and MAY count as a Reaction.

Additional Creature Types:

The Creature listed are the general types but are not a comprehensive list.  This feat can be used by any humanoid or monster with dangerous teeth, and MAY even have more powerful bites than 1d3. (DM's Option)