The Sauron expansion comes with a bag to use for tiles instead of a stack
It does indeed. It also gives the alternative Gandalf card for foresight:
Gandalf: Forsight wrote:
Draw 5 tiles from the back and display them face up. While they remain, players must chose from these tiles instead of drawing from the bag
There are also extra tiles for the added for when using Sauron and extra dark event tiles to make the bag draw more of a challenging game (with extra rules) with or without Sauron as a player.