Gloom Priestess

True Fateseal 1 (When this creature enters the battlefield, look at the top X of all opponent's libraries, you may put any amount of them on the top or bottom of their library in any order, where X is the number flowing "True Fateseal".)
Disappearing (At the beginning of your upkeep this creature gains a -1/-1 counter)
Whenever Gloom Priestess enters or leaves the battlefield, seach your library for a basic land, put it onto the battlefield tapped, then shuffle your library.