Thanks to the attack the other night, the assassins retreated because they couldn't escape Zaos's tracking skills. They only moved to a point where they were sure that they wouldn't leave that region and cause any more damage.
Zaos tried to decrease their numbers two nights after they returned, but he gave up on the idea when he noticed that they were moving in groups of ten. That sure was weird, considering that they were assassins. Regardless, Zaos didn't want to risk being bombarded by bolts again.
"I don't like this," Erean said. "I don't feel comfortable waiting here without knowing if more enemies have arrived or not."
They could always move in the group as well in order to deal with the assassins, but their range of search was big, but the groups were close enough to help each other in case something happens. So, if Erean decides to attack, he could risk being attacked in two other directions.
