The Arkenstone
Ered Mithrin Hero Expansion #74 (x3)
Attachement
[1]

Guarded (enemy or location).

Attach to a hero.

Each unique character you control gains +1 Willpower.

Action: Reduce your threat by 2 to attach The Arkenstone to a hero controlled by another player and raise that player's threat by 2. (Limit once per round.)