Rule 355.10.a

It is in a zone whose information status is not Public. e.g., “Ready a legend” targets a legend, because the Legend Zone is Public. e.g., “Return a unit from your trash to your hand” targets a unit card in your trash, because your trash is Public. e.g., “You may play a unit from your hand, ignoring its costs” does not target a unit card in your hand, because your hand is not a public zone.