User blog comment:Master Sima Yi/Assassinews 05-08-'14 – Assassin's Creed: Rogue announced/@comment-4892808-20141026210025/@comment-5174994-20141027025615

You either have it or you don't. So he has to be born with it. I think that it was said that most people can use it with training, but it comes more naturally to those with a high concentration of First Civ DNA.