Riddles in the Dark

When Riddles in the Dark enters the battlefield
create a treasure token.
In each player's upkeep he will look at the top
card of his library. Then his opponent will guess whether it is a land or nonland card. If the player
who guessed, guessed correctly he draws a card
and his opponent loses two life. If he did not
guess correctly he loses two life and his opponent
draws a card.