[@ShadowVentus]
Makes sense....

The only questions I have before I fully accept it are as thus:

1) Can he use this ability on any weapon he gains, provided it was previously used extensively by a powerful person?
2) Can he use abilities that rely on inherent circumstances? For example, if he wielded a weapon Mia wielded, would he automatically gain the black blood, or would he need to find some black blood to control? 
3) How many weapons does he have in his possession?
4) Can this technique be used with characters who are still alive?