Nostalgic Rub

If Nostalgic Rub is in your opening hand, you may begin the game with it on the battlefield.
When Nostalgic Rub enters the battlefield, you may exile any number of cards from your hand and draw that many cards.
At the beginning of your upkeep, choose a card at random that was exiled with Nostalgic Rub. Put that card on top of its owner's library.