[NTJedi]

I'm not sure why they failed to cast the spell. I would like to say from what I've experienced this is one of the worst spells to cast because there's a good chance the Lammashtas will attack the caster.

I even won a battle against a computer opponent because the Lammashtas killed the necromancer once they were summoned. All the undead marching towards my army, (40+ units), withered away. On a different occasion I had them kill one of my witches after being summoned.