Lidless Eye wrote:Clarification: In general, cards in your out-of-play pile and your marshalling point pile are considered to be actively in play for the purposes of being unique (if the card states it is unique).
Dark Minions, Placement of Cards “off to the side” (Clarification) wrote:Cards placed off to the side are in play for the purposes of uniqueness. Unless stated otherwise, when a host permanent-event is removed from the playing surface, any cards placed off to the side under it are discarded.
Uderlines mine.Great Secrets Buried There wrote:Playable if opponent has at least ten cards in his play deck. Opponent reveals the top ten card of his play deck to himself. If one is available, opponent must choose a non-special, non-hoard item from the revealed cards to place off to the side under this card (item does not give marshalling points and is considered out of play). If none are available, opponent must show you the cards he revealed to himself. Opponent shuffles all remaining revealed cards into his play deck. Opponent may play this item as though it were in his hand at any Under-deeps site. Alternatively, you may play this card as a resource on yourself if you have at least ten cards in your play deck. In this case, you and your opponent reverse roles.
Item placed off the side with Great Secrets Buried There is not in out-of-play pile. By default cards placed off to the side "are in play for the purposes of uniqueness", but Great Secrets Buried There states that item is out of play (not specifying any purposes nor exceptions).
So can I play unique item which copy is placed off to the side with Great Secrets Buried There?