sliced like a loaf of bread. As it was, she managed to roll backward and land on her feet.
The sound of the helicopter was getting louder behind me, but I didnât dare look.
Dr. Thorn launched another volley of missiles at Thalia, and this time I could see how he did it. He had a tailâa leathery, scorpionlike tail that bristled with spikes at the tip. The missiles deflected off Aegis, but the force of their impact knocked Thalia down.
Grover sprang forward. He put his reed pipes to his lips and began to playâa frantic jig that sounded like something pirates would dance to. Grass broke through the snow. Within seconds, rope-thick weeds were wrapping around Dr. Thornâs legs, entangling him.
Dr. Thorn roared and began to change. He grew larger until he was in his true formâhis face still human, but his body that of a huge lion. His leathery, spiky tail whipped deadly thorns in all directions.
âA manticore!â Annabeth said, now visible. Her magical New York Yankees cap had come off when sheâd plowed into us.
âWho are you people?â Bianca di Angelo demanded. âAnd what is that ?â
âA manticore?â Nico gasped. âHeâs got three thousand attack power and plus five to saving throws!â
I didnât know what he was talking about, but I didnât have time to worry about it. The manticore clawed Groverâs magic weeds to shreds then turned toward us with a snarl.
âGet down!â Annabeth pushed the di Angelos flat into the snow. At the last second, I remembered my own shield. I hit my wristwatch, and metal plating spiraled out into a thick bronze shield. Not a moment too soon. The thorns impacted against it with such force they dented the metal. The beautiful shield, a gift from my brother, was badly damaged. I wasnât sure it would even stop a second volley.
I heard a thwack and a yelp, and Grover landed next to me with a thud.
âYield!â the monster roared.
âNever!â Thalia yelled from across the field. She charged the monster, and for a second, I thought she would run him through. But then there was a thunderous noise and a blaze of light from behind us. The helicopter appeared out of the mist, hovering just beyond the cliffs. It was a sleek black military-style gunship, with attachments on the sides that looked like laser-guided rockets. The helicopter had to be manned by mortals, but what was it doing here? How could mortals be working with a monster? The searchlights blinded Thalia, and the manticore swatted her away with its tail. Her shield flew off into the snow. Her spear flew in the other direction.
âNo!â I ran out to help her. I parried away a spike just before it wouldâve hit her chest. I raised my shield over us, but I knew it wouldnât be enough.
Dr. Thorn laughed. âNow do you see how hopeless it is? Yield, little heroes.â
We were trapped between a monster and a fully armed helicopter. We had no chance.
Then I heard a clear, piercing sound: the call of a hunting horn blowing in the woods.
The manticore froze. For a moment, no one moved. There was only the swirl of snow and wind and the chopping of the helicopter blades.
âNo,â Dr. Thorn said. âIt cannot beââ
His sentence was cut short when something shot past me like a streak of moonlight. A glowing silver arrow sprouted from Dr. Thornâs shoulder.
He staggered backward, wailing in agony.
âCurse you!â Thorn cried. He unleashed his spikes, dozens of them at once, into the woods where the arrow had come from, but just as fast, silvery arrows shot back in reply. It almost looked like the arrows had intercepted the thorns in midair and sliced them in two, but my eyes mustâve been playing tricks on me. No one, not even Apolloâs kids at camp, could shoot with that much accuracy.
The manticore pulled the arrow out of his shoulder with a howl of pain. His breathing was heavy.