The enemy weren't coming directly in swarms - they were like rats, sneaking in from every direction, but primarily from the south - it was almost as if this was a symptom of a larger problem, rather than the problem itself. Defending the city would be all well and good, but it didn't seem to be solving anything, other than alleviating the immediate threat. Like the poisoned waters from the whirlpool, something far more dangerous seemed to be out there, somewhere.