When an army containing Undead takes a magic action, each Undead unit that rolls at least one non-ID magic result may add one additional magic result. The number of magic results that may be added in this way is equal to the number of Undead units in the Undead player’s DUA, up to a maximum of 4 per 24 points of total force size, or part thereof.

When an Undead unit is killed you may instead exchange it with an Undead unit of lesser health from your DUA.