Death call is a fourth-level death magic spell that costs eight spell points and raises units from a dead stack.
The Undead attacked us from the rear! But only our own dead were behind us…
When cast on a stack with dead members, Death Call creates a stack of the same type of creature on your side. Much like Create Illusion, this spell revives a certain number of hit points worth of creatures per casting (based on the power of your hero), in this case twice as many hit points as would be affected by Animate Dead. Unlike with Illusions, the called creatures possess all the abilities and traits of the original creature, including spellcasting, and cannot be dispelled. As with the Raise line of spells, this can be cast on dead stacks, or on stacks with dead members, and the total that can be called is limited by the number and hit points of the deceased creatures.
Animated creatures vanish after the battle ends, making them ideal for retaliation fodder and Sacrificial lambs.
This spell is probably best thought of as Phantom Image for Death. It has the usual downside (for Death) of requiring the targets to already be slain before you can copy them, making it more of a mid-battle spell, but the creatures that you get can use magic (if they were spellcasters), and don't have the vulnerability to dispelling that Illusions have.