Assassins love their dens almost as much as foxes love theirs. It's where they hang out, sharpening their knives and polishing their coins, so it's hardly surprising that when gangs of angry Templars start storming those dens, trying to dull the knives and mar the coins, the assassins are having none of it. Admittedly, it's a little surprising that there appears to be a tower defence minigame simulating those myriad historical moments in Assassin's Creed Revelations. We can now add magically barricading streets and commanding troops to the list of things parkour-killers are capable of. What next? I say fishing and basketball.
As in real life, conversations end with an invitation to leap off a rooftop.