Vol 10 Chap 1

The skill, [Create Undead]. Even if he created upper-tier undead, they would only be level 70, which he would not even trust to escort the Guardians.

No, I still have a trump card in store.

He had enhanced his undead creation skills through the use of a dark ritual.

He could only create upper-tier undead four times a day. However, if he divided those up into two uses, he could make undead of roughly level 90.

Ainz stroked his chin, and wondered what sort of undead to make. The thief-type Eternal Deaths, or sensory-focused Eyeball types…

Granted, the Eternal Deaths were excellent undead to use, but they had a passive skill called [Aura of Death and Decay] which was constantly in effect. It was a potent skill which combined the effects of Ainz’s [Despair Aura V (instant death)] and [Despair Aura I (fear)], making it a creature that could inflict instant death and stat penalties upon the enemy. In particular, the stat penalty was not a mind-affecting ability. This allowed the skill to bypass immunity to mind-affecting effects, which made it very hard to deal with.

That said, if this ability was used when friendly fire was enabled, it would swiftly paint a hellish picture of suffering and misery. Of course, he might be able to order them to suppress the ability, but bringing undead like that onto the city streets was complete insanity.