March of the Dead causes a powerful dark aura to surround a necromancer's
undead minions.
This aura has two effects. Firstly, it stirs the rage of the undead, causing
them to attack with greater fury, thus increasing the damage of their blows.
Secondly, it protects the undead against injury, providing effects that are
similar to the effects of the spell sanctuary.
The sacred rituals of March of the Dead only effect undead creatures.
Other animated beings (such as golems or animated objects) do not benefit
from the ritual.
See also: help sanctuary.