Do you actually declare one particular die as impossible to cancel?
Well effectively you could take one of the [crit]s that you roll for Ten and remove it from the pool of dice that can be canceled by evade dice. But you don't really remove it from play, because that [crit] could still be canceled with an evade token.
So effectively you take it out of one pool and place it in a 'can't be canceled by evade dice but can be canceled by evade tokens' pool...