Know Thy Enemy

Before the battle, select one unit in your opponent's army. Until the end of the battle, this Warlord has the following ability: Know Thy Enemy (Aura): While a friendly EXORCISTS CORE or EXORCISTS CHARACTER unit is within 6" of this Warlord, each time a model in that unit makes an attaack against the enemy unit you selected, add 1 to the hit roll.