DIS (like the underworld)

I almost die (again)

This arrow goes whizzing over my head. I duck instinctively and grab my earrings out of my pocket. They instantly become swords. I catch a glimpse of Annabeth battling some weird creature that's spraying a foul green liquid (probably poisonous) at her before I throw myself into the fray.
I stab viciously at a thing that seems to be an ugly old woman with wings. One of the three Erinyes, I remember. I slash at her, but she dives away, wheeling off into the distance and cackling loudly at me. I suddenly feel a slashing pain in my shoulder. I turn to see another of the things tearing viciously at me with cracked, yellowish teeth that would make a dentist cry. I yell and try to push it away with the flat of my sword, but it keeps coming at me. Then another one appears from the side.
Annabeth is still slashing at the poisonous one, but I can tell she's beginning to tire. The third Erinye is going after her as well. All three at the same time? The gods must really have it in for us. I continue to fight, but my blows are losing power and it's two against one. The silver symbols that usually guide me in battle are beginning to flicker and fade before my eyes. Is this what it's like to die?
But then, in the back of my mind, I remember something. Wasn't there an arrow whizzing over my head before the battle started? That must mean--
Suddenly the Erinyes drop dead before me and I look around to see three demigods, except they're not any demigods I know...
My brain has just enough time to register that they're wearing purple shirts before the pain in my shoulder makes me pass out.