Spikes transfers identity from person to person, and alter preexisting . Feruchemy copies or stores specific identity attributes and also the larger identity of the feruchemist acts as a lock on metalminds. I would imagine the bones of mistwraiths developing an identity to the animal the longer it held those bones. However creating wraiths & kandra would involve making their cognitive and physical identities more malleable.
my question is can kandra breach metalminds?