Stack

Some cards, like Gandalf's Cart (1U73) , stack other cards on themselves, for later use or for some sort of benefit. Stacked cards are not in play and thus cannot be spotted, but they also are not in a Discard Pile or Hand. They cannot be played unless another card specifically allows them to be played. Usually this is the card they are stacked on, as with Goblin Swarms (1R183) or Web (8C30) , but it can be another card entirely, like Sindri, Dwarven Lord (9R10) . Some cards can even play themselves from a stacked state, like Slaked Thirsts (7U14) and Isengard Tender (6U70) . If the card they are stacked on leaves play for any reason, all of the cards stacked on that card are discarded.