While he didn't know if the other monarchs could access this world, he was also actively trying to cover his track in this world, until he was powerful enough to deal with them, but the thing that made him depressed was something else.
'Why was I reborn?'
Ainz thought to himself, he kept thinking about how he had been reborn in this world, but could not find a reason why he was born.
'Was it because I still have something to do, just like the shadow god said? Or was it because I simply felt pity for?'
He thought for a few more moments, before an answer came to his mind.
'Besides, war and fighting, my previous life had no meaning, both humans and beasts revered my existence. Yet, in a world where I was the only one standing at the top of all things, I wasn't really revered but just feared. If I was an ant, I would have also revered a dragon out of fear.