Jesse, Drunk Magician

When Jesse, Drunk Magician enters the battlefield, look at the top ten cards of target
opponent's library, exile nine of them face down.
Show target opponent the remaining card and ask
"Is this your card?", then add it to your hand.
You may look at and cast any exiled card for as
long as it remains exiled, and you may spend
mana as though it were mana of any type to cast
that spell.
Jesse, Drunken Magician's power and toughness
are equal to number of exiled cards.