The Doom of Khaz-Urabiah

Prophecy (When you draw this, you may exile it
face up. At the beginning of your upkeep, if it's exiled
this way, put a prophecy counter on it. You may cast
it for as long as it remains exiled, and it costs {1} less
for each prophecy counter on it.)
Destroy all lands. For each basic land destroyed
this way, that land's controller searches their
library for a basic land and puts it onto the battlefield tapped. For each nonbasic land
destroyed this way, that land's controller creates a