How does nicrosil store different types of investiture?

[WhiteEmporer]

So does F-Nicrosil just store an investiture ability, or does it also score the raw investiture? I.e., could a surgebinding Nicro ferring store stormlight? Could an Elantrian nicro ferring store the Dor? Would it store the ability, the raw investiture, or both?

[Weltall]

Evidence from The Bands of Mourning suggest that it stores the ability. Marasi and Wax both need to ingest metal vials before they can use allomancy while using the Bands, which means they're not storing Preservation's Investiture already 'keyed' to particular uses but simply the ability to use the powers and they have to get the Investiture separately. Likewise I imagine that a medallion made by an Elantrian would (setting aside all the issues with Selish magic generally) store the ability to use AonDor but you'd still need to know the symbols to do anything with that ability. Surgebinding should work the same way and Brandon has said that the Honorblades granting the surges work on the same principles, so you'd get the ability to take in Stormlight and use whatever surges the medallion's creator had, but you'd need to have a Stormlight supply handy.

[+Invocation]

I bet it has something to do with Connection and Intent, honestly. You store the Investiture you have a Connection to and that you're wanting to store so it would take a Nicrosil Ferring who also had another set of Investiture to store other forms, I think.

That, or it gets converted to raw Investiture and it comes out as the Investiture you need. I guess we'll find out eventually.

[hoidanalsium he/him]

just looked on the coppermind this is a direct quote 

"Nicrosil is used to store Investiture. This ability is not understood (even by those who utilize it).A Soulbearer storing Investiture stores their ability to use their Investiture. Therefore, a Soulbearer could store their ability to use Feruchemy and another person tapping it would be turned into a temporary Feruchemist who has the ability to fill a metalmind (assuming the nicrosilmind was unsealed). Among other things, a nicrosilmind can be used to store the Divine Breath of the Returned and the ability to use various surges of the Knights Radiant."

this is still confusing but it seems to me that it stores both investiture and the ability to use it  

 

 

[WhiteEmporer]

Thanks all! It does seem like it stores both,  but also that Nicrosil is every bit as mysterious and confusing as I thought. Hopefully we get more in future books.