Death, The Final Horseman

Deathtouch
Whenever Death, The Final Horseman attacks or leaves the battlefield, put all other creatures into
three piles at random. Destroy all creates in one
of those piles and put all others on the battlefield
under their owners' control.
If Death, The Final Horseman would enter the battlefield instead put it into your hand and search your library for Conquest, The First Horseman.