Ruthless King of Knights, Saber Alter (FS/S64-E056 SP) [Fate/Stay Night [Heaven's Feel]]

[CONT] If your stock has 2 or less cards, this card gets +1500 power. [AUTO] [(1) Put 1 card from your hand into your waiting room] When this card is placed on the stage from your hand, you may pay the cost. If you do, search your deck for up to 1 "Master" or "Servant" character, reveal it to your opponent, put it into your hand, and shuffle your deck.