The power to make hair grow. Meet mean people, give them a Snidely Whiplash mustache. Then everyone can recognize whose mean. Liars could grow tails. Girl breaks your heart or busts your balls- BAM, have a little hair on the chest!
Meanwhile, you don't need to be afraid of dating people who have diease such as AIDS or whatever, he/she will being threat like normal lives.They used him to cure a mutant disease that was affecting other mutants. His body created antibodies to fight the disease and they used those antibodies to cure the other mutants affected by the disease.