[Milly]

Alternatively, you can choose an item from their inventory (a stack of ores, for example).

A stack of ores, alchemy ingredients, etc fit what the rule/mechanic is here for. Uniques are (obviously? maybe this isn't clear enough though) a no-go. You can only rob someone of those by capturing them.

Cool. Thank you. I think it should be clarified in the rules directly.