Sudden Assault
The Lost Realm#21 (x2/x0)

When Revealed: If the total of characters committed to the quest is greater than the total in the staging area, each enemy in the staging area makes an immediate attack against the first player. If no attach is made this way, search the encounter deck and discard pile for an Orc War Party and add it to the staging area. Shuffle the encounter deck. This effect cannot be canceled.