Shalltear?

The moon started to rise as the night sky was lit up with beautiful dazzling stars. The moonlight shines down upon the Great Tomb of Nazarick, its light peering through the small cracks yet to be filled up due to Floor 1 still being under construction. However, that traveling light shone upon a figure with pale shiny skin, beautiful but seductive crimson eyes, and long white hair seemingly tied up into a ponytail. Furthermore, her gown was no exception; she wore a soft black evening dress with a heavy skirt leading up to her upper body, embellished ribbons, and a short tailored jacket; even her hand was adorned by cute laced gloves. However, with all that beauty. Finally came a flaw, her chest was a mere cutting board without padding, but nevertheless, she covered that flaw by including an abundance of padding.

"Shalltear Bloodfallen," Momonga said, both confused and also relieved.

'Thank god, it seems that NPCs respawn when their corresponding floor is summoned. However, it doesn't seem that Shalltear is yet active; do I possibly require more floors? We set her to guard the first, second, and third floors in YGGDRASIL. But does that mean I need all three floors summoned and built? If so, that'll be a significant pain in my ass since I don't know how to get more floors and how I will protect Nazarick. First, though, I guess I could summon a few high-tier undead; but that comes at a risk. My summons are time-limited, meaning I'll have to come back and resummon them, not allowing me to stay out for long periods, but I could also use extended magic; that should increase it by a slight bit.'

Momonga debated his options mentally for a couple of seconds. Then decided what he'll do to protect Nazarick.

'I'll summon a few undead using [Summon Undead 10th Tier] since I promised I'd meet back up with Claire near the town center. Once I'm done with her, I'll just head back to Nazarick.'

Momonga stood up from his rocky seat, heading to a flat surface.

"[Summon Undead 10th Tier: Demon Lord]" Suddenly, a magical circle appeared and a demon lord rose up. He wore a rusted crown, and a blood-stained cape waved in the slight breeze coming through the unfinished cracked walls of Nazarick. The demon lord was adorned with a set of full-plate armor and multiple scythe-like curved daggers.

"[Summon Undead 10th Tier: Elemental Skull]" With another sudden magical circle appearing, a skull arose. The skull was surrounded by an enchanting aura that seemed to change between blue, red, green, and yellow.

Momonga looked at the two and put his hand up to his chin.

'These should be enough for now. The demon lord is level 70 though its stats are far beyond that. And the elemental skull is level 68; with its control of the four elements and assistance from the demon lord, they'll put up a heck of a fight.'

However, even after all that preparation, Momonga is still worried.

'Though, that does make my mind wonder; what if a player passes through these parts? Would the demon lord and elemental skull be enough? Hmm...'

Momonga thought long and hard but eventually couldn't think of anything else to put.

'Ugh! This would be much easier if Shalltear was active from the moment the floor was under construction.'

Momonga is angered by this new world's mechanics and frustrated at having no other option.

'I'll have to stay until this floor is complete so that minions start to spawn.'

Momonga walked back to his rocky seat, patting it down slightly to get some dust off.

'Hello, my rock. I'm back for a bit more.'

Momonga then sat down on the rock and waited until the floor was finished. He also let out a soft but quick sigh.

'Why couldn't this just be a normal summon, and everything completed off the back! What the heck world!'