It lets you risk milling yourself out, but can give you a whole host of board presence in the late game
(It's an artifact with ", , Discard a card, Sacrifice this token: Draw a card.") Land Windbrisk Heights Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.) This land enters tapped
What else can you ask for
Goblin and Zombie decks have rocked tournament tables in the not too distant past, and even in recent Standard we've seen Mice and Rabbit decks making waves
it forces your opponent to mill half their library for three generic, two blue
Flickering it is especially amazing