This should almost be called horn-call of Rossiel, because of how much it synergizes with her ability. Now she can commit to questing and potentially help out on defense as well, as long as you send a common enemy trait to the victory display.
Horn-call of Buckland
Attach to a or Hobbit hero.
Response: After you engage an enemy that shares a Trait with an enemy in the victory display, exhaust Horn-call of Buckland to ready attached hero. Then, that enemy gets −1 and −1 until the end of the round.
—The Fellowship of the Ring
ALeP - The Aldburg Plot #9. Lore.