Ysmzar, Heretic Keyshaper

At the beginning of your upkeep, shuffle
target opponent's library, and exile the top
card from it. You may play that exiled card
for as long as Ysmzar, Heretic Keyshaper is
on the battlefield. When a land is exiled
this way, you may have Ysmzar become an
8/8 artifact creature with vigilance and
haste until your next draw step.