Praetors' Endgame

You may only have one copy of Praetors' Endgame
in your deck
Search your library for {x} cards then an opponent separates them into 2 piles then put one pile into
your hand you may cast any of those cards without paying their mana cost then the other pile goes into
your graveyard.
If you search for 5 cards with endgame in them
you win the game.