Baron Cain!
His goal had always been to rule the Western territories and divide Arcadina.
Now, they don't know where this man got help from.
But Death found that a few scouts he sent hadn't returned, meaning they were either killed off or were still being tortured somewhere.
And with Baron Cain's abilities, he shouldn't be able to find Death's men.
It was because of this that death stopped scouting altogether and instead gathered all his men and rushed towards this region, away from the chaos.
In short, his move was smart because several hours after they left, the people behind Cain came looking for him.
But they didn't see anything.
And in this heavy weather called spring, trail traces were bound to get washed away.
They were also fortunate enough that they decided to flee by running across the river banks, allowing the horses to touch the water, hence washing their traces away too.