The black stuff surrounding him is... Something. I have a lore explanation for it, but I won't reveal it yet. I had made an original vector, but then I accidentally deleted it :(
After Silas had found Leavenworth, there was a reason why he couldn't find more children like him... Leavenworth was killing them all, in the hopes that Silas would give up... But he continued to search... After a while, Leavenworth had came across a company... When he had found them, many workers were confused as to why there was a boy there, so one of them tried to kick him out before someone told the worker not to- Their name was Doctor Jones, "My boy, how are you here?" he asked, Leavenworth didn't answer, "I never forget a face, you're Leavenworth, right?", Leavenworth looked him in his eye, "Yes..." He answered, "Follow me, I have much to teach you!" So Leavenworth, still a young boy, not knowing to not trust strangers, followed this man. The man taught him all about extradonaria's, and how he (Leavenworth) had one. After Leavenworth had heard about this, he finally knew why he had this power... So he destroyed the facility, THEY were the reason he was outcasted, THEY got rid of any chance he would get a real life. He started using his limb control to tear of the mans' arms and legs, no, tis is not but a scratch, (movie reference)... With this new intel in hand, he decided not just to kill the other children like him... But steal their power too. Maybe one day he could force Silas to focus more on him... Maybe one day he could be seated in a nice, comfortable home... Maybe one day his life would get better.