Sum of All

You may have only one copy of Sum of All in
your starting deck. Before you shuffle your deck
to start the game, reveal Sum of All, then put
it on the bottom of your library after shuffling.
If your starting library had 200 cards or more,
Exile your hand and graveyard, then shuffle all
exiled cards you own into your library.
Scry 5, then draw five cards.
"The sum is 0"