Shadow

Shadow may refer to either:

• Shadow Phase, the second of the six phases in the turn order
• Shadow Alignment, one of the two sides in this game. They are the enemies of the Free Peoples, and led by Sauron as he seeks to throw Middle-Earth into darkness.

You may also have meant Shadows, the set, or War of the Ring Block, which included the Shadows set, was also occasionally referred to as "Shadows Block".