Lirian had a strange look on his face as he offered his katana to Mordred, he did it for two reasons, firstly he wanted to see how intense the ability was and secondly he wanted to see if Mordred would have any strange effect on the blade.
The perk had many strange things that it could do, even his system was unable to identify such things, and the only recurring theme he found in heaven chosen people was that the plain always had an important task for them hence that was the only bit of info the system displayed, once Lirian had seen a man who could toss a dice and it would always land exactly on what he needed.
If he needed to lose, in order to make it big later the dice would do exactly what he needed, the guy was a commoner and he ended up richer than most nobles in the world.