Dear AnonPig here is just theory that me and my friend have been thinking about for a bit regarding the creation of weapons of sorrow. I speculate that a weapon of sorrow has to use the soul and sorrow of a living creature, and this would explain the use of names on the kings fall raid weapons as we are seeing a part of there soul, a part of there sorrow. This would also explain Necrochasm, Touch of malice and Thorn. Necrochasm and T.o.M have the souls of the Hive king and prince Crota and Oryx. But what of Thorn, well I believe that Thorn used the sorrow and at least part of the soul of the Noble man which in turn turned him into the man now known as Dredgen Yor. But what of Bad juju some of you may be wondering, well it is widely believed that Bad juju is a failed weapon of sorrow and this theory helps that by suggesting that no soul or true sorrow was put into it therefor meaning that it is not a true weapon of sorrow.