Your deck cannot have any cards with a mana cost less than 4.
With Jace and Sorin in play, cast Demonlord Belzenlok.
Demonlord Belzenlok will exile cards from your library until you reveal a card with a cost less than 4, and since there are no cards with that cost, he will exile your entire deck,
Sorin will prevent the damage done by Demonlord Belzenlok as it will have Lifelink
Activate Jace's +1 ability to win the game.