Thread:Zack Tan/@comment-26815449-20150810043502/@comment-88.193.142.137-20150810090755

Although I am not Zack, I've come to know that the Gigant Basilisk thing is from the Drama CD 2 which is to put a long story short; about Ainz's and Narberal's adventures as Momon and Nabel. So it is the same thing as the first Drama CD, but the mission is different. It had something to do with a noble falling heads over heels for Narberal and at one point of the Drama CD 2 they encounter a Gigant Basilisk, at which point Ainz tells Narberal to protect the people who were with them(including the noble) as Ainz himself as Momon goes to defeat the Gigant Basilisk. As far as I know, the Gigant Basilisk was quite easily defeated by Ainz, which was quite the imposing monster, seeing as even Evileye(or Gagaran) said it would be hard for the Blue Rose. This was basically just one big boost to Momon's popularity.

But either way, that's all I know. There might be someone more knowledgeable about the matter, but sadly I can't read or speak moon so all of this is what I heard from other people. Take it with a grain of salt.