Famine, The Third Horseman

Wither
At the beginning of each opponents upkeep tap,
half of their lands rounded down.
If Famine, The Third Horseman would enter the battlefield instead put it into your hand and search
your library for Conquest, The Second horseman
and up it into your hand then shuffle your library.
When Famine, The Third Horseman leaves the battlefield, search your library for Death, The
Final Horseman and put it into your hand then shuffle your library.