Thanos, The Mastermind

When Thanos, The Mastermind enters the battlefield you may search your library for a card
named inifty stone tracker and put it onto the battlefield without paying it's mana cost,
then shuffle your library.
Sacrifice this creature: Thanos, The Mastermind exiles half of all opponets creatures, half of their library, half of their hand and they lose half of
their lives. Then exile all of the infinity stones.