Welcome to CoinTalk. Unfortunately you have a coin that someone defaced and buried...now you've dug it up, be cautious around the time of the full moon...
Environmental toning damage to the Cupro-Nickel clad layer.. Here are examples from my Metal Detecting digs - Long time exposure will tone the copper in the Cupro-Nickel clad. Same goes for Nickels.
Thanks for the reply paddyman98. I got this coin as part of a collection I purchased. Appreciate the education, thanks again!