Alex, Usurper of Tamriel

When Alex, Usurper of Tamriel enters the battlefield, exile cards from the top of your
library until you exile a nonbasic land, and put it
onto the battlefield tapped. Put the remaining
cards on the bottom of your library in a random
order.
Alex, Usurper of Tamriel's power and toughness
are both equal to the number of nonbasic lands
you control.