Identidad
Identity is an ability within the Cosmere that allows a being to have sentience. It acts as a spiritual DNA and it functions with Connection in order to form a link to various forms of Investiture. For this reason it would be difficult if not impossible for someone to be a Mistborn and a Knight Radiant. Their Identity would have to have a Connection to Scadrial and Roshar.[Falta cita]
Feruchemy
In Feruchemy, Identity is stored in Aluminum. To effectively use Aluminum a feruchemist must have access to all the feruchemical powers. By storing his identity in aluminum and then filling another metalmind he can create an "unkeyed" metalmind that can be used by anyone. In certain cases, instead of allowing anyone to tap the metalmind, it would only allow people who could already use that kind of metalmind to access the power. One example is in The Bands of Mourning. When Wax finds a gold bracelet filled with healing power, Wayne, a gold Ferring, can access the power but Wax cannot.
Medallions
An unsealed metalmind is created by a Feruchemist filling an aluminummind while filling the metalmind with the desired trait or power.