Look to the sun
(Rule)Description: Once per game, at the start of any friendly Activation Phase, Gandalf can use this special rule so long as he is alive and on the battlefield. If he does, then until the end of the turn, enemy models Engaged in Combat with a friendly Cavalry model that made a Charge that turn, or Supporting a Combat against a friendly Cavalry model that made a Charge that turn, suffer a -1 penalty to their Duel Roll.