The second reason was actually simple but fu*cked up, he wanted them to suffer, feel pain, have a reason to change them into sort of demons.
Without pain, those girls would normally succumb to the warmth, and security of the family, and would never turn into executioners who executed his orders.
He knew that this was messed up as a reason but he didn't care. These girls only had the potential to be by his side, weren't by his side at the moment.
Furthermore, he was the only one who knew his thoughts, and this would be just one more of his secrets. After all, even if they found out there was nothing they could say, or do about it.
With those thoughts, Eric entered the tent where his 4 companions would be resting together with him, as he was a bit tired of the day.
In just one day he had been able to take down 3 small camps without problems. His count for the first day was 110 dead, and a few tenths injured.
