So Omen Machine is on the field and an opponent just used Jace, the Mind Sculptor's ultimate to exile my library and I have no cards in hand, so no library left. When it is my turn, do I lose? Opponent think so, but since I am not drawing due to Omen Machine, I believe I survive and the exile command fizzles. We couldn't find any specific rules to address the situation so called a draw (I still think I'm right though).
Anyone able to clarify this ruling?
You would not lose the game from being unable to draw a card.
This is because the rule that causes you to lose the game states (empahasis mine):
104.3c: If a player is required to draw more cards than are left in his or her library, he or she draws the remaining cards, and then loses the game the next time a player would receive priority. (This is a state-based action. See rule 704.)
and Omen Machine says (emphasis mine):
Players can't draw cards.
At the beginning of each player's draw step, that player exiles the top card of his or her library. If it's a land card, the player puts it onto the battlefield. Otherwise, the player casts it without paying its mana cost if able.
So what happens is:
This is further supported in the Gatherer Rulings of a similar card, Maralen of the Mornsong which states:
While Maralen is on the battlefield, no player can lose the game due to being instructed to draw a card with an empty library.
You won't lose. The game continues.
Losing a game due to drawing is very specific to only drawing. See the rules on drawing a card:
120.4 A player who attempts to draw a card from a library with no cards in it loses the game the next time a player would receive priority. (This is a state-based action. See rule 704.)
If something says you're not drawing, you don't, and you can't lose the game this way without drawing.
Omen Machine would try to exile a card and find none to exile. (It won't fizzle, it just won't do anything.)
You continue play with no cards in your hand or library. You've got only whatever is on your battlefield and in your graveyard. Your opponent has whatever it is they have. You'll probably lose, but they'll have to find another way to make you lose — such as by removing your Omen Machine.
