The Silvermoon Knight perished amidst the mountains of the orcs, and not in the desert.
The known destiny could not be altered, an absolute law; thus, no matter how hard Amberser tried, it was impossible for him to take down the Silvermoon Knight here.
This was also why Amberser had been scared out of his wits initially, facing this old man who absolutely couldn't die, all his struggles seemed futile.
But he quickly realized something—if the Silvermoon Knight wasn't fated to die here, it meant that the Goddess of Fate's test wasn't about Amberser killing the Silvermoon Knight.
Once he understood this, Amberser immediately calmed down and then he noticed something.
The Silvermoon Knight had only unleashed one slash and then did not pursue any further.