bands of mourning medallions

[Guest Father Bin]

I understand how the medallions grant you Feruchemy but how do they grant Allomancy?

[Karger]

Nicrosil can store the potential to use any kind of investiture.  With a bit of work you could probably put some surgebinding in there as well.  We actually do not know how the medallions themselves are made. 

[Mist]

I believe that someone with that type of Allomancy would store their Investiture in a medallion while storing their Identity. That Investiture would have no Identity and would be able to be tapped by others. 

[Honorless]

We don't really understand the process completely. Creating an Allomantic medallion would require an unsealed metalmind (rather than an unkeyed metalmind, which is a metalmind created by a Feruchemist while storing Identity so any Feruchemist with the relevant power can access it). Unsealed metalminds use Nicrosil, which stores Investiture itself, so anyone can use it. We also don't know what excisors are yet, which are tools involved in the creation of medallions.