Pale Blade
The Fellowship of the Ring #169 (x3/x1)
Treachery
Morgul.  

Surge.

When Revealed: Attach to a Nazgûl enemy in play, if able. (Counts as a Weapon attachment with the text: "Limit 1 per enemy. Attached enemy gets +1 Attack and cannot take non-combat damage.")

...in their haggard hands were swords of steel.
–The Fellowship of the Ring