Many Thonged Whip
Shadow and Flame #153 (x2)
Weapon.   Flame.  

When Revealed: Attach Many Thonged Whip to Durin's Bane as a Weapon attachment with the text:

Forced: When Durin's Bane attacks, the defending player must discard 1 card at random from his hand. its left it held a whip of many thongs.
–The Fellowship of the Ring