In high player count Fellowship where seeing lots of enemy is commonplace I found that this is a really useful card, especially when the decks have a dedicated attacker, preferably with Ranged. We have had good success using it with Legolas, Bow of the Galadhrim/Rivendell Blade and Mighty Prowess to get 4 progress tokens and 2 free damage almost every round.
Attachment. Cost: 1.
Attach to a or Rohan hero. Restricted.
Response: After attached hero participates in an attack that destroys an enemy, exhaust Rohan Warhorse to ready attached hero.
Their horses were of great stature, strong and clean-limbed... The Two Towers
Jeff Lee Johnson
The Voice of Isengard #8. Tactics.