Every Vampire Counts army is animated and driven onwards by the sorcery of its General. Your army’s General must be a Wizard. If he is able to choose a spell lore, he must use the Lore of Vampires.

Slain General

At the end of the phase in which the General is removed as a casualty, and at the start of every friendly turn thereafter, all friendly Undead units on the battlefield must take a Leadership test. If the test is failed, the unit immediately suffers a number of Wounds equal to the amount by which it failed the Leadership test, with no saves of any kind allowed. These Wounds must be distributed as if from a shooting attack. If, at the start of any of your turns following the death of the General, there is one more friendly Wizard on the table who knows spells from the Lore of Vampires, no unit the army needs to take this Leadership test – the Wizard’s powers are sufficient to sustain the Undead for now.