Tear Through Thought

Target opponent reveals his or her library. If no land cards are revealed this way, he or she loses
the game. Otherwise, choose half of the land cards revealed this way, rounded up and exile
them. Then he or she shuffles the rest of the revealed cards into his or her library.
"Rip the memories of the land from the caster and she ceases the spellstorm."
-Circu, Dimir Lobotomist