Zombie units can be increased beyond their starting size by spells and effects that add models to an existing unit. In addition, when Zombie units are successfully targeted by the Invocation of Nehek spell, they regain an extra D6 Wounds.
Source: Warhammer Fantasy: 8th Edition
Zombie units can be increased beyond their starting size by spells and effects that add models to an existing unit. In addition, when Zombie units are successfully targeted by the Invocation of Nehek spell, they regain an extra D6 Wounds.