The Emperor's biggest concern about the Blood Crystal was Daemon getting his hands on a Platinum-grade weapon that would basically put him at the top of the empire.
But without that weapon, Daemon would still have to hide around places like this, and Leopoldine's stability would be guaranteed.
He would still prefer to have the Blood Crystal in his possession, but this item had already been used to form an extremely powerful weapon, and he could not take it from Lothur.
The emperor could only laugh at the situation and feel some relief.
Lothur, at least, was on the run, trying to escape the Seraphim Church, so he would not be staying in Leopoldine to bring chaos here.
As the emperor laughed, Daemon had an ugly expression on his face, having been hindered by his son at the last moment.
But with his fight against his father having been stopped, it didn't take him long to gather with his people and leave that place, fleeing.