"Humans."
"They are sufficiently weak, abundant in numbers, widely sourced, and cheap."
"There's no need to worry about Dwarves coming to our door with hammers, nor do we have to particularly seek out criminal prisoners... very convenient."
"Most importantly, there is a special adaptability in human bloodlines, with very low rejection to the blood of other races, almost able to intermarry and reproduce with all species."
"This was only previously observed in Dragon Descendants."
"But the price of Dragon Descendant materials is relatively high, and my demand is too great with insufficient funding... I had to choose humans."
"The experiment can continue to progress."
Scribble, scribble, scribble...
[Research Log · Day Forty-eight]
"Strange, is there an issue with my approach?"
"Why has the experiment stalled?"
"At which step did it all go wrong? Why are there so few offspring from these experimental subjects? What on earth is..."
Scribble, scribble, scribble...
