Wolf of Isengard
The Treason of Saruman #52 (x2/x1)
(25) 2 3 1 4

Forced: When Wolf of Isengard is dealt a shadow card with a Wizardry effect, either discard 1 card from your hand, or Wolf of Isengard makes an additional attack against you after this one.

Shadow: Deal 1 damage to the defending character.