entombing

entombing is the act of tying a person’s soul to an item, most like a weapon

Soul

an Entombed weapon gains an unnatural sheen not seen in a normal weapon. Sometimes a symbol or an object important to the person appears on the weapon

It binds a soul to a weapon

Binding the sound to a weapon

earth

Iron/silver or
Wood(preferably Holy wood or Lightwood
blood

Slayer magic
Black smithing

it can't bind a soul to an already forged weapon
the blood has to be fresh(within 24 hrs) to be used

in normal hands hunter made weapons are deadly but in a hunter's hands, particularly if they are bonded to that weapon it is an extension of themselves that a normal person can never reach.