Bors, Drunken Gambler

Grymestone, Drunken Gambler can't be countered.
(When this card enters the battlefield choose one.)
-Choose a player at random, have them shuffle their hand and graveyard into their library and divide into two piles. They pick one and exile the rest.
-Choose an opponent, flip a coin, whoever loses, loses half their life rounded down.
-Destroy three lands at random.