Disclaimer: The writing gets much better in the second chapter. I am fully aware now that writing in first person was a bad choice so I changed it to third person later in this story. Please bear with this first part.

My name is Ainz Ooal Gown, or at least that's what i'm called in this world. My original name was Suzuki Satoru and i was brought into a new world along with my guild base and all its inhabitants when the game i played, Yggdrasil came to an end. I was originally really surprised, and also incredibly stressed when i couldn't log out of the game anymore and the Npcs started talking. Thankfully my undead physiology helped me contain some form of calm and not reveal myself as someone who had no idea how to be a leader to the extremely loyal Npcs that saw me as some kind of omniscient god! Oh that's right, i now was the king of a kingdom stretching across the entire continent, i have no idea how it all happened but it was apparently a part of the 10,000 year long plan that some Ainz fellow came up with, he sounds like a smart guy I would very much like to meet him someday.

Recently i have been running away from my duties as king and have been adventuring as my Momon persona, it's a surprisingly relaxing activity to kill monsters and explore dungeons filled to the brim with traps. One day when i went out to explore a dungeon i realised as i enter that this was no normal dungeon…. this was a Guild Base! We have only found one other Guild Base since we came to this world so the discovery of another base was a huge event!

I immediately returned to Nazarick to inform Albedo of this discovery and assemble a force of Mercenary Npcs and summons to help me explore this base, i didn't want to risk the lives of the Custom Npcs despite resurrection being a thing or at least that's what i told them. The real reason for me not to bring them was if that base would reveal something about all players once being human, i wouldn't know how to handle a situation like that! It was safer to just bring Mercenary Npcs and summons, i would also stack up on some extra gear, potions, scrolls and the like, i don't know what situation i could run into in there. I would also bring more Mercenary books and a lot of gold in case i needed to summon more of them.

When the time came to start the invasion of this Guild Base i decided i would start out in my Momon persona, i could tank more and didn't need to worry about my mana running low, i therefore could save up my mana until an actual threat showed up and turn back to my usual gear. I decided to have the Death Knights lead the charge, with some Demon-type offensive Mercenary Npcs just behind them as well as a large amount of Hanzo's hidden all around us.

This was a pretty much flawless formation that wasn't even necessary to begin with. When we entered i had expectations of a grand fight but instead i got… nothing. It was completely empty, not even Pops were showing up. I thought that perhaps it was some plan that the creators of this base had to deceive the invaders! I had to admit that it was a really good plan so that was probably the case, but they weren't going to get the best of me! I continued with the formation despite the lack of opponents until i got to the heart of the base and realised… it was really just empty? Sometimes my level of mental gymnastics might actually rival Demiurge's.

One of the Hanzo's came up to me and asked:

"My lord, what do you wish of us?"

"Secure the base, search for hidden traps and possible enemies, if you find something like a vault in this place then inform me immediately."

"Yes My lord, it will be done"

As such most of the Hanzo's left leaving me with the Demon Mercenaries and the Death Knights.

"Ten of the Demons and Twenty of the Death Knights come with me, the rest of you stay here."

I decided to check out what the creators of this place has built here, while i didn't think i would find something as impressive as the places in Nazarick there might still be something that could tell me about how the creators of this place were as people.

Except for the normal things you might find in a Guild Base such as floors meant for fighting i found some rooms that resembled the Ninth Floor of Nazarick. What i managed to find that caught my eye was a movie theatre, a sort of "game" room with things like Pool and Ping Pong and a library. The former two didn't contain much but the library was almost on the same level as Ashurbanipal in Nazarick… almost. While i wasn't much of a reader myself i knew that we could learn alot from this place, things like who used to live here and information about the game.

I ventured deeper into the library when i stumbled upon a book that caught my eye.

"The Record of the Four Holy Weapons huh? Might be information about special weapons back in Yggdrasil" I mumbled to myself. The story was kind of bland, it told of a disaster coming upon the world and to counter the disaster they would summon heroes from other worlds. Such a story i would call mere fantasy if not for the fact that it personally happened to me once! Anyways each of the heroes had a legendary weapon - a Sword, a Spear, a Bow and a Shield. I wouldn't really classify a shield as a weapon but this author seems to think so so i guess i have to roll with it.

Bla bla bla, the heroes goes on a journey, train to get strong and stop the disaster, kind of cliche. Kind of a bad story, all the characters seems like horrible people, especially the princess. She was manipulative and was obsessed with the heroes. The main characters - the heroes seems like quite good people though. The Sword Hero was active and powerful, the Spear Hero valued and protected his friends and the Bow Hero would never tolerate injustice. They were quite bland characters but at least seemed like good people.

When it came to introduce the Shield Hero all i saw was blank paper? Wasn't so weird to stop a project halfway through, my Guildmates often did that when we built Nazarick. I could point out many projects that went unfinished there. I was about to put down the book when suddenly it's pages started to light up and a magic circle appeared below me. The demons caught on that something wasn't alright and rushed to where i stood but they wouldn't make it in time. I felt my consciousness slip away for the first time in several years and when i woke up again i was not in the library anymore.

I looked around and saw a bunch men in robes ahead of me and besides me were three… boys who looked just as confused as i felt right now. It looked like we were in a room made of stone bricks and on the floor were some kind of magic circle, probably what summoned me here. I felt something weird on my left arm and when i looked there was a small shield there. I had many questions but no answers, i pondered them in my head until one of the people in robes in front of me started speaking:

"Oh Heroes! Please save our world!"

A second passed and then in unison all four of us shouted:

"WHAT?!"

Author's Note's:

Hello guys i hope you liked the introductions to this story. Rising of the Shield Hero & Overlord are two of my favorite anime's, manga's and light novels that i've ever read so i had this idea on having Ainz being in the story of Shield Hero and it lead to me writing this. This is the first time i have ever written something like this so if you have any ideas on how to improve i would very much like to hear so. I'm also Swedish so i'm not used to using capital I's in the middle of a sentance so there's that if that stuff annoys you. I'm gonna write a part 2 after hopefully reading some comments about this and i have planned for it to be quite a bit longer than this prologue.

Anyways i hope you enjoyed so see you later!