During the upkeep, Oath of Druids will trigger.
Target the player with more creatures than you and mill your entire library, draw a card for turn and win.

Win the game

Laboratory Maniac

Oath of Druids

At the beginning of your upkeep, Oath of Druids triggers, causing you to mill your entire library since it contains no creature cards.
In your draw step, Jace's ability causes you to win the game instead of drawing from an empty library.

Infinitely self-mill

Jace, Wielder of Mysteries

During the upkeep, Oath of Druids will trigger twice.
First you mill into Laboratory Maniac and put it on the battlefield.
Then mill your entire library, draw a card for turn and win.

Combos with "Oath of Druids"