I do not really get why i can read this on pc but not on my phone.
Also @ MadToby i like your attempt but these 2 chapters feel a more than difficult to read
I guess what he wanted to do was improve the demon army so that they may be able to kill him in the future after having gained more strength, but he got desperate after finding out they had a time limit for how long they could stay.
He does not seem like the kind of person that could get bored...
I think you made an error on page 16, I believe it is talk not walk, or if it is walk i think "walk among other races/species" otherwise decent translation