WT (Emperor's Wrath): Lord of Ordnance

Each time you roll a wound roll of 6+ for an attack made by a friendly EMPEROR’S WRATH unit while they are within 6" of your Warlord in the Shooting phase, the Armour Penetration characteristic of that attack is improved by 1 (i.e. AP0 becomes AP-1, AP-1 becomes AP-2).