The Mountain of Fire #11 (x3)
Item.   Weapon.  

Attach to a Rohan hero. Restricted.

Response: After attached hero is declared as an attacker, exhaust GĂșthwinĂ« to give that hero +2 Attack for this attack. If this attack destroys an enemy, return a Rohan ally from your discard pile to your hand.

“GĂșthwinĂ«!” cried Éomer. “GĂșthwinĂ« for the Mark!”
–The Two Towers