Cerebro

{1}{u}{t}: Scry 2, then draw a card.
{2}{u}{t}: Look at the top 3 cards of opponents
library, then put them back in any order.
{3}{u}{t}: Search your library for a mutant
creature card, put that card into your hand,
then shuffle your library.
Cerebro's activated abilities cost {2} less if you
control Professor Xavier or a telepath creature.