Really big library

Really big library enters the battlefield
tapped. You do not have a limit for your hand size.
{t}{1}{u}{u}: put a wisdom counter on Really big
library.
{t}, remove a wisdom counter: draw 3 cards.
Any player may pay {3}{u} and draw a card.
Discard a card: draw 2 cards.
At the beginning of your upkeep, if Really big
library has at least 10 wisdom counters on it,
you may take 10 counters off of Really big library
and draw 12 cards.