Riezel believed that Ainz fighting Shalltear was almost a certainty.
With Shalltear now under mind control due to a World Item, the only way to break free was for her to die once. Otherwise, the mind control effect could only be removed with a World Item of equal level.
It wasn't that Ainz didn't possess any World Items, but among those he owned, only two had the ability to counteract mind control.
However, since those two were part of the 'Twenty', which was the name given to twenty World Items unrivaled in power in YGGDRASIL, they could only be used once and would vanish afterward.
Needless to say, they were precious treasures meant to be reserved for life-and-death crises in the Great Tomb of Nazarick as an absolute last resort, so for this reason, forcing Shalltear to die once was a solution Ainz had no choice but to consider.
Even so, there was one problem.
Despite losing much of his humanity and his emotions over time, Ainz still held an unwavering affection for the Great Tomb of Nazarick and its NPCs—a bond that had not faded.
Because of this, to prevent the NPCs of the Great Tomb of Nazarick from killing one another and to ensure the death of Shalltear, arguably the strongest among the Floor Guardians, Ainz would undoubtedly take matters into his own hands and fight Shalltear personally to end her.
Riezel had foreseen this outcome.
Riezel, already quite a distance away from Ainz and out of his field of vision, stood in place, deep in thought.
'Figuring out if those magic can also work on me is totally worth a shot.'
'Anyway, if there's a chance to get something for free, there's no way I'm letting it slip by.'
Such was Riezel's mindset.
Freebies?
Anyone with a sane mind would understand that the more one could grab, the better.
'Honestly, I've already gained so much this time that it feels almost wrong to want more.'
As Riezel thought this, he mentally reviewed various new magic spells he had just acquired and couldn't help but smile.
It was understandable, as he had finally obtained the magic spells he had coveted since arriving in this world.
For example, instant-death magic and, best of all, resurrection magic.
Yes, he had finally learned the forbidden magic that allowed him to bring the dead back to life.
5th-Tier Magic, Raise Dead.
7th-Tier Magic, Resurrection.
9th-Tier Magic, True Resurrection.
From the lowest-tier resurrection magic to the highest, Riezel had mastered several tiers of it. While it wasn't an exhaustive collection, he at least had these super useful magic spells in his arsenal now.
With them, unless he chose not to intervene, it would be nearly impossible for someone to die in front of him.
They were, after all, magic spells that touched upon the realm of the gods, and if taken to another world, they would undoubtedly instill fear and awe.
Of course, using resurrection magic to revive the dead didn't come without a cost.
In YGGDRASIL, when using the lowest-tier resurrection magic, Raise Dead, to revive the dead, the resurrected individual would lose a significant amount of experience points, which was equivalent to five levels.
Because of this, anyone below Level 6 could not be revived with this magic, and even those above Level 6 would become significantly weaker after revival. Additionally, if there was no corpse or the corpse was severely damaged, reviving the dead with this magic would be nearly impossible.
By using Resurrection, however, the degree of level loss upon revival could be reduced, and it could somewhat ignore the damage to the corpse, allowing it to be fully restored.
True Resurrection went a step further, minimizing level loss even more, and could revive the dead even without a corpse, ensuring a much higher success rate.
In summary, the higher the tier of resurrection magic, the lesser the aftereffects, though some degree of impact would still remain. Considering this, the best approach was to avoid the need for resurrection entirely and focus on preventing death as much as possible.
Similarly, instant death magic also had limitations, particularly regarding its success rate.
Yes, the instant death effect of instant death magic could be resisted.
In YGGDRASIL, its success rate depended on several factors, including the difference in levels, magical energy, special attributes, and even luck between the caster and the target. Against opponents of a similar level, instant death magic was often difficult to land successfully.
Meanwhile, Ainz, with Overlord as his race and various powerful job classes that complemented each other, possessed various racial abilities and special skills that enhanced the effects of instant death magic, causing his instant death magic to have an alarmingly high success rate.
Even dragons, creatures with exceptionally high anti-magic attributes, could be killed by Ainz in a single breath. If he used his most terrifying special skill, known as 'The Goal of All Life is Death', even gods could potentially be one-shot.
Riezel, unfortunately, had no such racial abilities or special skills.
As a result, instant death magic in Riezel's hands wasn't nearly as terrifying, and in most cases, it could only be used to deal with weaker enemies.
Nevertheless, Riezel didn't feel disappointed, as even without instant death magic, he had gained magic that, in his eyes, was no different from them—overpowered magic.
"Time Accelerator."
As Riezel chanted this magic, the world around him seemed to slow down.
No, it wasn't that the world slowed down—it was that his own time sped up as if he had entered a world with increased viscosity, paused in place.
Moving at an astonishing speed, Riezel crossed the vast grassland and entered the forest.
What he used was time magic, a magic spell that could slow the flow of time—a thoroughly overpowered magic. Even though it had the drawback of preventing him from attacking during its effect, that didn't change its status as an overpowered magic in his mind.
Naturally, this wasn't the only time magic he possessed.
In the 9th Tier category, there was a single-target time magic capable of completely freezing an individual's actions called 'Temporal Stasis'.
In the 10th Tier category, there was an AoE time magic that could bring time to a complete halt called 'Time Stop'.
Sadly, all of these time magic shared the same limitation—no attacks could be performed, and no harm could be inflicted during their activation.
Regardless, that didn't change the fact that they were overpowered.
Besides them, Riezel also discovered other magic spells worthy of being called overpowered.
"Body of Effulgent Beryl."
A vivid green radiance enveloped Riezel's body.
It was a magic spell that reduced blunt damage for a certain period and nullified one instance of blunt damage completely.
"Body of Effulgent Heliodor."
In the next moment, the green radiance faded, replaced by a golden-red radiance.
It was a magic spell that reduced slashing damage for a certain period and nullified one instance of slashing damage completely.
"Body of Effulgent Aquamarine."
Just like before, the golden-red glow now disappeared, replaced by a sea-blue radiance.
It was a magic spell that reduced piercing damage for a certain period and nullified one instance of piercing damage completely.
Without a doubt, if these three magic spells could be used simultaneously, they would completely block a single instance of any type of physical damage and reduce any type of physical damage during their duration, providing maximum protection to the user.
Unfortunately, they couldn't be used simultaneously.
If one was activated while another was already in use, the later magic's effect would overwrite the earlier one.
Nonetheless, as long as their user used them selectively based on the type of enemy, they could unconditionally nullify one attack from their enemies.
In other words, by repeatedly using this magic at the right time, it would practically be impossible to get hurt by physical attacks.
'I must admit, while this world's magic might not be crazy strong in terms of raw power, since even the so-called Super-Tier Magic is at best on par with Tactical-Class Magic, they're ridiculously broken outside of raw power.'
Riezel thought with a smile, both impressed and delighted that he had managed to acquire so many overpowered magic spells.
'With them, even if I don't get anything else in this world, this dimensional travel is a success.'
With this thought, Riezel began testing and experimenting with several different magic spells on the spot, and only after he felt satisfied did he stop.
'Once I see his fight with Shalltear and confirm a few of my ideas, I'll quit milking him and head off to check out other places.'
Remembering Ainz, Riezel smiled slightly.
He couldn't just keep hanging around the protagonist forever, could he?
As soon as he finished collecting all the magic spells he wanted and accomplished his goals in this place, it was definitely time to leave, see more of this world, and challenge strong people or monsters.
Having come to a decision, Riezel immediately used Greater Teleportation to leave the area.
Not long after Riezel had departed, several figures suddenly appeared near his vanishing spot, scanning their surroundings briefly before quietly discussing among themselves.
"Hmm, that human's gone already."
"He escaped again?"
"It wasn't an escape. Lord Ainz never let us attack him."
"Why not? If you ask me, that human's been way too brazen around our Supreme Being and is full of unpredictable factors. Wouldn't it be best to deal with him now?"
"Exactly because he's unpredictable that Lord Ainz has been cautious. Lord Ainz probably doesn't want to act unless he's sure he'll succeed."
"Even if you say that, he's clearly heading toward Shalltear now. Are we really just going to stand by and let it happen?"
"Enough. Lord Ainz will figure out how to handle that human. All we need to do is follow orders. Just make sure he's not hanging around Nazarick and won't pose a threat to us."
"I know... Let's head back then."
"Um."
Just like that, their conversation ended, and they soon vanished without a trace.
By this time, dawn was beginning to break.
Eventually, the night's darkness faded completely, replaced by light as the sun rose from one side of the vast grassland, gradually climbing higher into the sky before its rays stretched across the land bit by bit, reaching E-Rantel and extending further north to a certain forest.
Over there, a grand battle was about to unfold.