Underground Armoury
The Treason of Saruman#56 (x2/x1)
4 (3)
While Underground Armoury is in the staging area, it gains: "Forced: After an enemy engages a player, deal it a shadow card."

Wizardry: Each player exhausts a character he controls.

The shafts ran down by many slopes and spiral stairs to caverns far under; there Saruman had treasuries, store-houses, armouries, smithies, and great furnaces. -The Two Towers