SHAMANIC SKULLCAPE

An orruk shaman who takes the skulls of enemy wizards can draw on some of their residual
power, bolstering his spells.
Add 1 to casting rolls for the bearer. In addition, if an enemy WIZARD is slain by wounds inflicted by attacks made with the bearer’s melee weapons, you can pick 1 spell known by the slain WIZARD. The bearer knows that spell for the rest of the battle.