The wolf referred to the Wolves' and his own 'code'. Is this just meant to suggest that his nature is to kill, or is there a specific philosophy adopted by the Wolves? A code of conduct, so to speak. We still know very little about the foes considering that they're expected to play a major part in Season 6. We don't know anything about their motives, their hierarchy (or whether there is a leader at all), their HQ, or most importantly, their end-goal. What do the Wolves want out of this? They pillaged Noah's old residence but moved on without settling, so shelter isn't their priority...