Sterner than Steel

Event. Cost: 0.

Response: Exhaust a Weapon or Armor card attached to the defending character to cancel a shadow effect just triggered during combat.

"Do what you will; but I will hinder it, if I may."
Éowyn, The Return of the King
Chris Rahn

The Flame of the West #8. Tactics.

Sterner than Steel

Since usually an uber-defender will be loaded with lots of Armor attachments this free shadow cancellation is a must on any deck with such a defender and Tactics access in my opinion, with the most obvious choice of defender being Beregond.