Purple Guy

When you cast Purple Guy, shuffle. Then reveal
cards from the top of your library until you
reveal a legendary creature with mana value X
and put it onto the battlefield. Put the rest of the revealed cards on the bottom of your library in a
random order. Exile Purple Guy.
Purple Guy's power and toughness are equal to
nothing. How did you get him in play? As a
reward for achieving this, when he dies,
draw a card. You're welcome.