Your saliva can burn other creatures like acid.
Benefit
Your bite attack deals an extra 1d4 points of acid damage with each successful hit.
Special
You must have a natural bite attack to take this mutation. You can gain this mutation a number of times equal to your Con bonus (minimum 1). Each time you take it after the first, it costs one additional MP and deals an additional 1d4 acid damage.
You cannot gain this mutation if you have the Venomous Bite mutation.