Attach to the Ring-bearer.
Attached hero gets +1 
and +1 hit point.
"I should feel happier if I knew you were wearing it. I have a fancy it would turn even the knives of the Black Riders..." –Bilbo, The Fellowship of the Ring
Attach to a Warrior hero or Gandalf. Restricted.
Attached character gets +2 
.
Response: After attached character destroys an Orc enemy, draw 1 card.
"...at his side was the elven–sword Glamdring, the mate of Orcrist that lay now upon the breast of Thorin under the Lonely Mountain." –The Fellowship of the Ring
Attach to a Noble hero or Aragorn. Restricted.
Attached hero gets +1 
+1 and +1 .
Response: After an attack in which the attached hero defended resolves, exhaust AndĂșril to target the enemy that just attacked. Declare attached hero as an attacker against that enemy (and resolve the attack).
Setup: The first player claims The One Ring and attaches it to the Ring-bearer.
Attached hero does not count against the hero limit. The first player gains control of attached hero.
If The One Ring leaves play, the players lose the game.
Attach to
Aragorn.
Quest Action: Exhaust Aragorn and PalantĂr of Orthanc to discard the top card of the encounter deck. If Aragorn's is greater than the discarded card's
you may add PalantĂr of Orthanc to the victory display and remove it from the campaign pool to choose a player. That player reveals 1 fewer encounter card this phase (to a minimum of 0).
Forced: After a player draws any number of cards, Saruman attacks that player. Deal and resolve 2 shadow cards for this attack. Then, remove 1 damage from Saruman.
While Saruman has any hit points remaining, the players cannot win the game.
Setup: The first player claims The One Ring and attaches it to the Ring-bearer.
Attached hero does not count against the hero limit. The first player gains control of attached hero.
If The One Ring leaves play, the players lose the game.
Attach to Aragorn.
While Aragorn is questing, each other questing character you control gets +1
While Aragorn is attacking, each other attacking character you control gets +1
Seven stars were about it, and a high crown above it, the signs of Elendil that no lord had borne for years beyond count.
–The Return of the King
Setup: The first player claims The One Ring and attaches it to the Ring-bearer.
Attached hero does not count against the hero limit. The first player gains control of attached hero.
If The One Ring leaves play, the players lose the game.
Midnight. Action: Claim this objective and attach it to a hero you control. Counts as an Artifact attachment with the text: "When attached hero attacks and Oathbreaker that enemy loses the Spectral keyword until the end of the phase."
If unattached, the first player claims Sword of Belegost and attaches it to a hero he controls.
Attached hero gets +4
Response: Exhaust Sword of Belegost to cancel a shadow effect just triggered.
If unattached, the fist player claims Map of Ered Luin and attaches it to a hero he controls.
Action: Exhaust Map of Ered Luin to choose a non-unique location. That location gets -2 until the end of the phase.
If unattached, the fist player claims Keys of Belegost and attaches it to a hero he controls.
Action: Exhaust Keys of Belegost to choose a hero. Add 1 resource to that hero's resource pool.
If unattached, the fist player claims Dwarven Torch and attaches it to a hero he controls.
Action: Exhaust Dwarven Torch to choose a non-unique enemy. That enemy gets -1 and -1 until the end of the phase.
If unattached, the fist player claims Blue Mountain Gem and attaches it to a hero he controls.
Action: Exhaust Blue Mountain Gem to choose a player. Reduce that player's threat by 1.
Cannot be discarded by player card effects.
The Cursed Sword counts as a Weapon attachment with the text:"Forced: After Captain SahĂr attacks and deals excess damage, assign that excess damage to Captain SahĂr as resources. (Limit once per round.)"