" Kekrops leaned away from Hazel as if she somehow offended him. ‘Millennia ago, we were driven underground by the two-legged humans, but I know the ways of the city better than any. I came to warn you. If you try to approach the Acropolis aboveground, you will be destroyed.’ Jason stopped nibbling his cake. ‘You mean … by you?’ ‘By Porphyrion’s armies,’ said the snake king. ‘The Acropolis is ringed with great siege weapons – onagers.’ ‘ onagers?’ Frank protested. ‘Did they have a sale on them or something?’ ‘The Cyclopes,’ Hazel guessed. ‘They’re supplying both Octavian and the giants.’ Percy grunted. ‘Like we needed more proof that Octavian is on the wrong side. "