Duel of Kings

Duel of Kings was a battle between Sorcerer King Ainz and Elf King Decem that took place whilst the former was raiding the Elf Country's treasury, using the nation's war with the Slane Theocracy as a distraction. It was the Sorcerer Kingdom's first and only major battle in the entirety of the conflict.

Background
Learning of the Elf Country's war with the Slane Theocracy, Sorcerer King Ainz traveled to the country with the 6th Floor Guardians, Aura and Mare, in hopes of convincing its Dark Elf population to migrade to the Sorcerer Kingdom; all whilst avoiding getting involved in the conflict. Unfortunately, the Dark Elves got embroiled in the war when Elf King Decem ordered the mass mobilization of the entire nation after the Theocracy's forces had reached the Elven Capital. As a result, despite previously wishing to not get involved with the conflict, upon learning of the treasures within the capital, the Sorcerer King changed his mind and hatched a scheme to loot the treasury.

While the Assault on the Elven Capital raged on, Ainz, Aura, and Mare infiltrated the city undetected, with Ainz using [Perfect Unknowable] on himself to remain undetected. Arriving at the Elven Palace, they eventually made their way to the treasury. Before long, however, they were confronted by Elf King Decem, who had detected their presence and [Teleported] to their location. Questioning the intruders as to who they were, the Elf King unleashed his overwhelming presence, causing Aura and Mare to take a defensive stance while Ainz confirmed that the monarch could not see through his cloaking. Impressed that the twins could resist his power, Decem concluded aloud that they must be his grandchildren. This statement proved so outrageous that Ainz and the twins even briefly considered the possibility of it being true.

Having previously been ordered by Ainz not to start a fight unprovoked, Aura stroke up a conversation with the Elf King to extract information. Questioning him as to who he was, the monarch was outraged that she did not already know before introducing himself as Elf King Decem Hougan. Aura next asks why the king was not on the frontlines. Decem, however, stated that a "Supreme Being" should not serve but be served, which the twins actually agree with. The question still stood though: why was the Elf King not on the frontline? The question answered itself, however, as just then the capital was breached, causing Decem to comment on how "bothersome" this was but that dealing with it himself would be "too troublesome".

Decem then ordered the twins to come with him, causing Aura to question him as to what he was planning. In response, the Elf king ordered her to bear his offspring, having deduced she and her brother were cross-dressing, leaving both twins flabbergasted.

While this was happening, the still concealed Ainz had been silently appraising the Elf King and buffing himself with magic. Observing the conversation, the Sorcerer King grew more and more disgusted with his fellow monarch's arrogance. In the end, he finally snapped when Decem ordered Aura to have intercourse with him and punched the "pedophile" in the face. With Ainz's cloaking now canceled due to launching an attack, a shocked Decem questioned what an Undead was doing here and turned to Aura and Mare. Before the twins could answer, however, Ainz falsely claimed that he was their guardian created through the combined power of them and their parents. He then declared that, if the Elf King wished to take them, he would need to beat him first, [Messaging] Aura and Mare to come to his aid should he get cornered.

Even though Ainz's declaration was meant to taunt the Elf King, he was instead only amused by it and stated that he will "discipline" the undead by showcasing the difference in their power.

Battle
Despite Ainz proposing a one-versus-one battle, Decem just rolled his eyes at this and proceeded to summon his Primal Earth Elemental, Behemot to fight for him.

Aftermath
TBA