When Mausoleum Turnkey enters the battlefield, return target creature card of an opponent’s choice from your graveyard to your hand.
602.3. Some abilities specify that one of their controller’s opponents does something the controller would normally do while it’s being activated, such as choose a mode or choose targets. In these cases, the opponent does so when the ability’s controller normally would do so.
602.3a If there is more than one opponent who could make such a choice, the ability’s controller decides which of those opponents will make the choice.
Edited Nathan Long (March 11, 2014 11:16:56 PM)