Dunedain Warning is a nice, good, vanilla card. Extra defense is never bad (except on maybe Gimli?) and this one is non-restricted, costs one in the richest sphere and has that extra versatility if the encounter phase goes awry. One of my favorite uses is in a resource gen. deck where in the late game, it often ends up top-decking, so the money piles up. I can pass this around to every hero I need to defend and know they'll be in ship-shape.
Attachment. Cost: 1.
Attach to a hero.
Attached hero gains +1
Action: Pay 1 resource from attached hero's pool to attach Dúnedain Warning to another hero.
Conflict at the Carrock #26. Leadership.