As usual, when the deck runs out of cards, you both take one more turn. As the deck will be empty on Otto’s final turn, all he will do is take coins from any Gear cards that are still in play.

Before proceeding to scoring, Otto returns all Supplies that are still on his Gear cards to the reserve, then Tucks every card he has in play. This includes all of his Gear, and the Villagers that he played during setup.