The legions of the Tomb Kings are no longer beings of flesh and blood, but sun-bleached bones animated by ritualistic magic that stride slowly but inexorably towards their enemies.
Models with this special rule are ‘Undead’. Undead models cannot march (unless they have the Fly (X) special rule and choose to move by flying). In addition, all Undead models have the following universal special rules:
• Fear
• Immune to Psychology
• Unbreakable
• Unstable
A character with this special rule cannot join a unit without this special rule, and vice versa.