Domineering Italian Overlord

It is stipulated all over the world that no one cares about anything about the underworld. If the people in the underworld don't do big things for the people, the government won't care. If relations between countries arise, the military power of the world will take care of it. The protagonist is the son of a mafia boss from Italy. His father died in a mafia war, and his bloodline means that he has a 5% chance of being killed and has the ability to read people's hearts. Then the protagonist came to Italy, because he came to Italy firstly to recruit more boys who can fight, and secondly to find a superpower decoration called the 'Dark Necklace'. There are many kinds of superpower decorations. There are many types of super power necklaces. You don't activate it just by finding the necklace, but you choose the owner of the necklace. Then more and more of his younger brothers finally caught up with the Italian underworld... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.