T: Add C.
2, T, Sacrifice Warped Landscape: Search your library for a basic land card and put it onto the battlefield tapped. Then shuffle your library.
Quote from silicontraveler »Aaand there you have it. Nahiri is using the cryptoliths to twist the mana of the plane, causing the madness, presumably for revenge against Sorin Markov for letting Zendikar be destroyed by the Eldrazi he swore to help contain.