Great Bite

You Know how make attacks count with your fangs.

• You can increase the damage die of your bite by one size category. (1d4->1d6->1d8->1d10->2d6->2d8->2d10 etc.)
• If you roll a 20 on an attack with your fangs, you can add 2d6 to the total damage from the bite. 

Special: This feat can be taken more than once. Each time, the damage die increases by one size and you gain one extra dice on a roll of 20.