Your body and mind have benefited from the experiments and training performed by the National Institute of Mental Health.  You can take a +2 to ANY Ability Score, or +1 to any two Ability Scores.  This also locks you into one class for the duration of the campaign, but allows you to take on the Cleric, Sorcerer, Warlock, or Wizard classes.  Your life is also extended by 4 x its norm.  

This Feat is only available for Mousefolk and Ratfolk.