Annabeth screamed, "Percy!" just as a two foot blast of lightning narrowly missed his head. He turned and slashed at a hords of dracaena, as they began their charge. Suddenly, a noise blew over Annabeth's head, she turned to look towards it, only to see a dragon, unlike anything she'd ever seen before. The dragon roared as a torrent of pure flames blasted from it's mouth, the ground in front of her was charred to a cinder, and the various plants had been reduced to ashes.
The dragon began to take flight, as it flew its way into the sky, it smashed one of the godly watchtowers to bits, scattering demigods and allied monsters alike. That was when a collection of arrows sprouted from it's neck, the dragon turned, only to have one of it's eyes poked out by a flaming arrow, one of the arrows flew past it, and impaled itself into the ground, Percy noticed that the arrow was about three feet long, and the tip was about the size of his head.
As the dragon began to dissipate into the dark energy it had come from, a collection of warriors charged forth, some wielding bows and arrows, others bearing a collection of musical instruments, all seeming to cast spells or something. As Percy stared, a volley of arrows came flying from the surrounding hills, he watched, agape, as a wave of arrows decimated an entire legion of scythian dracaena.
Out from the split between the two largest hills, came to chariots, each annihilating monsters in their wake, each was piloted by a rider with a bow and arrow, but one wore a yelow and gold armor, and the other's armor was as silver as the moon. The one in the moon-like armor was Artemis, and the other was her brother, Apollo.
"Father!" cried Artemis as she rode out in front of him, he turned to look, but his eyes were a milky white, he raised his master bolt, but it was blasted out of his hand before he could fire, he turned, as a torrent of water struck him across the face. He spotted poseidon, conjuring what little water he could from a nearby oasis.
That was when all hell broke loose, the mountain began to shake, slowly starting to split into two peices, from the gap created, a horde of cyclops poured forth, they charged out, armed with wooden buckler shields, and various maces and flails.
"Retreat!" was all Artemis could say over the screamed of a hundred dozen cyclopes. The ground shook, and the air was filled with the screams of demigods, as the ground began to shake from the sheer force, of a hundred or so cyclopes.