Ainz Ooal Gown vs Riku Aganeia

Ainz Ooal Gown vs Riku Aganeia was a battle in the war between the Sorcerer Kingdom and the Re-Estize Kingdom. It was a duel between Sorcerer King Ainz Ooal Gown's body double, Pandora's Actor, and the Argland Council State Councillor Tsaindorcus Vaision, who aided the Kingdom under the alias "Riku Agneia" by controlling a magic armor.

Background
During the war between the Sorcerer Kingdom and the Re-Estize Kingdom, it was decided by Ainz that Pandora's Actor will have his battle at the Re-Estize pretending to be the Sorcerer King Ainz. Pandora's Actor was to serve as bait without having a World Item equipped to protect himself in order to lure out strong foes like the one he was face-to-face with for a very short period of time.

In his battle against this unknown high-leveled warrior, Pandora's Actor while under the form of Ainz attempts to strike a conversation with him. It was to the point of hoping to provoke a reaction out of the foe throughout the battle.

At the same time, while battling the said armor, Pandora's Actor would intentionally throw the fight on purpose in order to carefully analyze his opponent's advantages and favors. He was given the order by Ainz to prolong the fight with this warrior as long as he could, with the objective of attaining as much information as he possibly can surrounding the armor's powers and finding out the identity of the individual utilizing it.

Battle
When Albedo left him alone to chase after the Red Drop adventurer, Pandora's Actor as Ainz and sharing the same thought process as the original was the only one left in the military encampment. Sensing another enemy was fast-approaching from behind him via teleportation, he temporarily impede his opponent's arrival with [Delay Teleportation]. Ainz used this opportunity to buff himself with [Body of Effulgent Beryl] and prepare trap spells like [Explosive Land Mine] until his foe arrived face-to-face before him. Upon the warrior's arrival to his vicinity, Ainz's trap activated and an explosion went off because of it.

Nonetheless, the mysterious warrior with four floating weapons (A katana, a spear, a hammer, and a greatsword) emerges unscathed from the destruction. Ainz tries to engage in a conversation with the warrior and get intel out of it. Having failed to gauge his opponent’s reaction through an exchange of words, the warrior himself was not willing to give the Sorcerer King much time to speak, as it unabashedly took an offensive battle stance. Once the hammer in the warrior's arsenal floated to where it could easily grab the weapon, Ainz did not leave that piece of intel to go unnoticed by him. He thought this meant that their target was not Albedo, but rather himself. Since the warrior had not bothered to converse with him at all, Ainz deduced that it was not trying to buy time. Ainz believes that the warrior was probably planning to end this fight by killing him before any backup could arrive. Everything up until this point of the battle had occurred well within the margins of Ainz’s plan. Still, there was no telling or predicting what move the warrior will do next as Ainz does battle with it.

Ignoring the words of the Sorcerer King, the warrior moved its hand in a somatic gesture, causing one of its floating weapon, the giant hammer to suddenly shoot forward at Ainz. Since he is unable to avoid such a high-speed strike, Ainz allows it to hit him without making a move. The hammer's bludgeoning damage was completely nullified by Ainz's [Body of Effulgent Beryl] spell upon coming into contact with his body. Ainz mocks the warrior that he had already taken several precautions to deal with his own weaknesses as an undead. Ignoring what he says, the warrior responds by casting [World-Separating Wall] to trap the Sorcerer King from escaping the battle against it. As a result, a space-warping shockwave passed by Ainz, extending to take on the form of a 1-kilometer dome which encompasses their one-on-one battle. Though this was an unknown ability, Ainz could still pick up on certain aspects of it. He shortly deduced that this was an ability that expended HP and quite a lot of it. Ainz had seen his opponent’s immediate loss of HP when he had activated that ability through his [Life Essence] spell. When using [Mana Essence], he picked up nothing in contrast, meaning that his foe was of a pure warrior build with no mana at all.

Looking to pardon the unknown assailant's prior ambush, Ainz decided to reintroduce himself to the nameless warrior that he doesn't the identity of. Refusing to stay quiet any longer with the Sorcerer King, the armor finally spoke and reveal its name to be Riku Agneía. Ainz suspect there were some truths and lies mixed together to it. Recalling how the bards sang tales of the armor that appears supposedly platinum, Ainz narrows the individuals down to be only two out there who most likely have ties to it. Ainz presume the armor was an entity that was not humanoid or someone by the name of Riku Agneía from the Thirteen Heroes. He offers the warrior Riku a chance to submit to him and become a subordinate of the Sorcerer King. As the latter did not respond to him, he implores Riku even further to take his offer into consideration, willing to put an end of conquering the Re-Estize Kingdom for the sake of recruiting the warrior into the Sorcerer Kingdom. In the end, the warrior declined his offer and it resumes fighting with him once more. The warrior Riku cast [Cloak of Light] and that led to his armor to begin glowing. For a brief moment, Ainz thought that it was the Sun reflecting off of his armor until he noticed that Riku’s HP had just decreased. Through seeing how Riku activate its ability, Ainz had concrete proof that Riku’s abilities were powered by his own health pool.

Ainz attempted to escape the [World-Separating Wall] dome casted by the warrior using [Greater Teleportation] but failed. Seeing that he cannot leave the dome, he was also able to keenly take notice of how the barrier did not stop him from teleporting within its boundary but outside it. Realizing the crucial intel that was and how far away the warrior is from where he is at, he decided to use the opportunity to experiment on the barrier for the meantime until Riku catches up to him. Ainz toss a gold coin on the wall of the barrier and it bounces off. At the same time, he casts the [Lightning] spell at a pre-calculated angle to penetrate the barrier but it didn't get pass through the wall.

Just as he became satisfied with the results of his experiments, his [Delay Teleportation] spell activated once again when the warrior appears nearby. For the second time, Ainz cast [Body of Effulgent Beryl] and stood there, with his back towards Riku. Once Riku arrives to his destination, he was immediately hit by the same bludgeoning hammer like before. Although the bludgeoning attack was completely nullified by [Body of Effulgent Beryl], he felt somewhat dumbfounded and surprise by how that offensive move was handled as it sent him flying and pressing against the barrier when that was supposed to not happen.

However, Riku’s attack did not follow this rule. Normally when an attack’s damage had been nullified, its secondary effects would not apply. Although he asked the warrior about what he did to the weapon, the latter answers it differently much to his annoyance. Not responding to Ainz's question, he only warns the Sorcerer King that even if he was to try teleporting away from him, the latter will not be able to successfully utilize it in escaping outside this barrier. He threateningly stated that his fate was to be perish here by his own hands. The hammer quickly returned to Riku’s side at the same time it was launched. Along the way, Ainz discover that the four weapons surrounding Riku are a bit different they were from before as each of it appears to be glowing white. Ainz watches silently as Riku’s health had decreased even further. With all the weapons now shining, Riku appears to have lost more of its health increasingly than when he activated [Cloak of Light] on his armor. Ainz ponders whether this was because he had to apply that ability to each weapon separately or because teleportation had cost him a bit of HP too, leaving more to desire from this fight.

Having seen the warrior's resolve to fight him to the death, Ainz magically pulled out two floating weapons of his own via [Twin Magic: Obsidian Sword] and attempted to clash blades with it. Riku deflected one of Ainz's two swords with his greatsword. To his surprise, he can't help but be baffled by how nonhuman Riku's dodge was in response to his other blade slash. Riku unnaturally dodge it without problem by performing a sideways somersault at head's height. Normally when a humanoid jumped, they would bend their knees and apply force on them. There should be reflexive movements before the actual jump. However, Riku skipped all of that steps, applied no force at all, yet still performed a sideways somersault in the same stance he had this entire time while fighting him. Ainz attempted to land blows on Riku once again but his twin blades were easily deflected by the other weapons floating around the latter.

Under Riku's control, the greatsword, as if it had a mind of its own, flew at tremendous speed towards Ainz. In response, Ainz cast a defensive tier spell, [Wall of Skeleton] to shield himself from the incoming attack. As the newly-created wall was instantly destroyed by the greatsword in one fell swoop, the next thing Riku did was to dish another counterattack utilizing the greatsword to cleave him from top to bottom. In place of where the [Wall of Skeleton] stood, the honed edge of the greatsword pointed towards Ainz as it hovered. Ainz had thought that it would return to Riku’s side after that hit, but instead, it flew towards Ainz again. On the contrary, Riku was standing still in his original position, in his original pose, letting the weapon go in pursuit after him. From his observation of Riku's pose over the course of their battle, Ainz had a feeling that he and his armor function like a puppet but cannot confirm if that was the case. He speculates that this isn't something like [Psychokinesis] controlling the weapons, but the armor too. Ainz starts to harbor doubts whether he was fighting a living person or not, thinking there is the likelihood chance that the armor may be empty inside and controlled by someone.

Seeing how Riku is planning to attack him once more, Ainz pulled out a Blasting Staff to intercept the heavy blow and hold off the formidable warrior. Ainz tries to cast [Grasp Heart], thinking whether it could have immunity to necromancy or resistance against negative status effect. before using [Greater Teleportation] to instantaneously move above it on air to avoid the brunt of his enemy's greatsword strike. After doing so, Ainz cast [Body of Effulgent Beryl] for the third time as precaution. When Ainz retreated to the sky after taking that heavy below, the warrior follow suit and ascended on air and chase the latter from above once he spotted where it was at. With the two obsidian swords being meaningless in his situation, Ainz dropped the two floating obsidian swords above Riku while descending down from the sky to which the latter easily deflect away.

After descent, he was met with a spear, one of Riku's weapons thrown down at him from above. Upon dodging that attack, he was then confronted by Riku who shortly descended from the sky after him. Seeing Riku change stance by gripping its greatsword, Ainz tried to hastily intercept his attempt to attack the former, but only to be deflected by the floating weapons like the latter's katana. He tries to slow the warrior down with [Call Greater Thunder] yet that attack alone didn't faze or disrupt Riku's movement whatsoever. As he fast-approach Ainz without slowing down, the warrior Riku painfully tanks the undead's powerful lightning spell along the way while continuing onward with his charge towards the Sorcerer King. It was not as though Riku hadn't taken damage, Ainz could see his HP pool falling via [Life Essence]. Now that Riku was within his range and is about to strike him, Ainz swing his staff back and forth towards the warrior who tanks his physical counterattack at the same time. Between the two strikes from both sides, Ainz inflicted a knockback effect on Riku to push him far away while he felt the floating katana’s strike from Riku only grazed him by a little, barely touching his sternum.

So far in this fight, Ainz was able to successfully discern that Riku’s tactic up till this point had been to rely on his auto-attacking weapons in battling him. Though Riku had wielded his greatsword, he had not used any special abilities or martial arts to go along with it. Right now, Ainz did not have a firm grasp on what his abilities are as a warrior at all.

Afterwards, he uses this chance to cast [Summon Undead 10th], conjuring forth a high-tier undead creature called the Doom Lord as replacements for his two floating obsidian swords to assist him in battle against Riku. As Ainz, Pandora's Actor order the Doom Lord to activate its special ability [Ruinous Night] and be on guard for Riku, further commanding the summoned monster to assess whether or not the armor warrior they're fighting is a living creature. While so, Riku closed the distance between himself and the Sorcerer King, fearlessly charging forward at Ainz without any hesitation whatsoever. Faced with the rapidly-approaching Riku, the Doom Lord tightened his grip on the War Scythe weapon it had multiples of. Throughout his battle with the warrior Riku, much to his suspicion, he eventually deduced the way how that the armor is fighting him seem like as though a mere puppet was being manipulated behind the scene without a wearer. He found the armor's movements made it all the less believable to him that a living being like Riku was in that armor to begin with.

Aftermath
To Be Added....