Karn, The Omniscient

Whenever an opponent would draw a card look
at the top two cards of your library you can put
one of them into your graveyard and the other
into your hand. An opponent can pay {2} to stop
this effect from happening.
"Everything you do, everything you will do. It is all
in vein. Nothing can stop the world from what is
coming. Not even you, adventurers inc."