The look Hazel gave him must have been more severe than she realized.

Leo gulped. 'Yeah, got it. White Mist good. Black smoke bad.'

Hazel advanced. The giant spread his arms. The domed ceiling shook, and the giant's voice echoed through the room, magnified a hundred times.

Formidable? the giant demanded. It sounded as if he were speaking through a chorus of the dead, using all the unfortunate souls who'd been buried behind the dome's stelae. Because the girl has learned your magic tricks, Hecate? Because you allow these weaklings to hide in your Mist?

A sword appeared in the giant's hand a Stygian iron blade much like Nico's, except five times the size. I do not understand why Gaia would find any of these demiG.o.ds worthy of sacrifice. I will crush them like empty nutsh.e.l.ls.

Hazel's fear turned to rage. She screamed. The walls of the chamber made a crackling sound like ice in warm water, and dozens of gems streaked towards the giant, punching through his armour like buckshot.

Clytius staggered backwards. His disembodied voice bellowed with pain. His iron breastplate was peppered with holes.

Golden ichor trickled from a wound on his right arm. His shroud of darkness thinned. Hazel could see the murderous expression on his face.

You, Clytius growled. You worthless 'Worthless?' Hecate asked quietly. 'I'd say Hazel Levesque knows a few tricks even I could not teach her.'

Hazel stood in front of her friends, determined to protect them, but her energy was fading. Her sword was already heavy in her hand, and she hadn't even swung it yet. She wished Arion were here. She could use the horse's speed and strength. Unfortunately, her equine friend would not be able to help her this time. He was a creature of the wide-open s.p.a.ces, not the underground.

The giant dug his fingers into the wound on his biceps. He pulled out a diamond and flicked it aside. The wound closed.

So, daughter of Pluto, Clytius rumbled, do you really believe Hecate has your interests at heart? Circe was a favourite of hers. And Medea. And Pasiphae. How did they end up, eh?

Behind her, Hazel heard Annabeth stirring, groaning in pain. Percy muttered something that sounded like, 'Bob-bob-bob?'

Clytius stepped forward, holding his sword casually at his side as if they were comrades rather than enemies. Hecate will not tell you the truth. She sends acolytes like you to do her bidding and take all the risk. If by some miracle you incapacitate me, only then will she be able to set me on fire. Then she will claim the glory of the kill. You heard how Bacchus dealt with the Alodai twins in the Colosseum. Hecate is worse. She is a t.i.tan who betrayed the t.i.tans. Then she betrayed the G.o.ds. Do you really think she will keep faith with you?

Hecate's face was unreadable.

'I cannot answer his accusations, Hazel,' said the G.o.ddess. 'This is your crossroads. You must choose.'

Yes, crossroads. The giant's laughter echoed. His wounds seemed to have healed completely. Hecate offers you obscurity, choices, vague promises of magic. I am the anti-Hecate. I will give you truth. I will eliminate choices and magic. I will strip away the Mist, once and for all, and show you the world in all its true horror.

Leo struggled to his feet, coughing like an asthmatic. 'I'm loving this guy,' he wheezed. 'Seriously, we should keep him around for inspirational seminars.' His hands ignited like blowtorches. 'Or I could just light him up.'

'Leo, no,' Hazel said. 'My father's temple. My call.'

'Yeah, okay. But '

'Hazel ...' Annabeth wheezed.

Hazel was so elated to hear her friend's voice that she almost turned, but she knew she shouldn't take her eyes off Clytius.

'The chains ...' Annabeth managed.

Hazel inhaled sharply. She'd been a fool! The Doors of Death were still open, shuddering against the chains that held them in place. Hazel had to cut them free so they would disappear and finally be beyond Gaia's reach.

The only problem: a big smoky giant stood in her way.

You can't seriously believe you have the strength, Clytius chided. What will you do, Hazel Levesque pelt me with more rubies? Shower me with sapphires?

Hazel gave him an answer. She raised her spatha and charged.

Apparently, Clytius hadn't expected her to be quite so suicidal. He was slow raising his sword. By the time he slashed, Hazel had ducked between his legs and jabbed her Imperial gold blade into his gluteus maximus. Not very ladylike. The nuns at St Agnes would never have approved. But it worked.

Clytius roared and arched his back, waddling away from her. Mist still swirled around Hazel, hissing as it met the giant's black smoke.

Hazel realized that Hecate was a.s.sisting her lending her the strength to keep up a defensive shroud. Hazel also knew that the instant her own concentration wavered and that darkness touched her, she would collapse. If that happened, she wasn't sure Hecate would be able or willing to stop the giant from crushing her and her friends.

Hazel sprinted towards the Doors of Death. Her blade shattered the chains on the left side like they were made of ice. She lunged to the right, but Clytius yelled, NO!

By sheer luck, she wasn't cut in half. The flat of the giant's blade caught her in the chest and sent her flying. She slammed into the wall and felt bones crack.

Across the room, Leo screamed her name.

Through her blurry vision, she saw a flash of fire. Hecate stood nearby, her form shimmering as if she were about to dissolve. Her torches seemed to be flickering out, but it might just have been that Hazel was starting to lose consciousness.

She couldn't give up now. She forced herself to stand. Her side felt like it was embedded with razor blades. Her sword lay on the ground about five feet away. She staggered towards it.

'Clytius!' she shouted.

She meant it to sound like a brave challenge, but it came out as more of a croak.

At least it got his attention. The giant turned from Leo and the others. When he saw her limping forward, he laughed.

A good try, Hazel Levesque, Clytius admitted. You did better than I antic.i.p.ated. But magic alone cannot defeat me, and you do not have sufficient strength. Hecate has failed you, as she fails all of her followers in the end.

The Mist around her was thinning. At the other end of the room, Leo tried to force-feed Percy some ambrosia, though Percy was still pretty much out of it. Annabeth was awake but struggling, barely able to lift her head.

Hecate stood with her torches, watching and waiting which infuriated Hazel so much, she found one last burst of energy.

She threw her sword not at the giant but at the Doors of Death. The chains on the right side shattered. Hazel collapsed in agony, her side burning, as the Doors shuddered and disappeared in a flash of purple light.

Clytius roared so loudly that a half-dozen stelae fell from the ceiling and shattered.

'That was for my brother, Nico,' Hazel gasped. 'And for destroying my father's altar.'

You have forfeited your right to a quick death, the giant snarled. I will suffocate you in darkness, slowly, painfully. Hecate cannot help you. NO ONE can help you!

The G.o.ddess raised her torches. 'I would not be so certain, Clytius. Hazel's friends simply needed a little time to reach her time you have given them with your boasting and bragging.'

Clytius snorted. What friends? These weaklings? They are no challenge.

In front of Hazel, the air rippled. The Mist thickened, creating a doorway, and four people stepped through.

Hazel wept with relief. Frank's arm was bleeding and bandaged, but he was alive. Next to him stood Nico, Piper and Jason all with their swords drawn.

'Sorry we're late,' Jason said. 'Is this the guy who needs killing?'

LXXVI.

HAZEL.

HAZEL ALMOST FELT SORRY FOR CLYTIUS.

They attacked him from every direction Leo shooting fire at his legs, Frank and Piper jabbing at his chest, Jason flying into the air and kicking him in the face. Hazel was proud to see how well Piper remembered her sword-fighting lessons.

Each time the giant's smoky veil started creeping around one of them, Nico was there, slashing through it, drinking in the darkness with his Stygian blade.

Percy and Annabeth were on their feet, looking weak and dazed, but their swords were drawn. When did Annabeth get a sword? And what was it made of ivory? They looked like they wanted to help, but there was no need. The giant was surrounded.

Clytius snarled, turning back and forth as if he couldn't decide which of them to kill first. Wait! Hold still! No! Ouch!

The darkness around him dispelled completely, leaving nothing to protect him except his battered armour. Ichor oozed from a dozen wounds. The damage healed almost as fast as it was inflicted, but Hazel could tell the giant was tiring.

One last time Jason flew at him, kicking him in the chest, and the giant's breastplate shattered. Clytius staggered backwards. His sword dropped to the floor. He fell to his knees, and the demiG.o.ds encircled him.

Only then did Hecate step forward, her torches raised. Mist curled around the giant, hissing and bubbling as it touched his skin.

'And so it ends,' Hecate said.

It does not end. Clytius's voice echoed from somewhere above, m.u.f.fled and slurred. My brethren have risen. Gaia waits only for the blood of Olympus. It took all of you together to defeat me. What will you do when the Earth Mother opens her eyes?

Hecate turned her torches upside down. She thrust them like daggers at Clytius's head. The giant's hair went up faster than dry tinder, spreading down his head and across his body until the heat of the bonfire made Hazel wince. Clytius fell without a sound, face-first into the rubble of Hades's altar. His body crumbled to ashes.

For a moment, no one spoke. Hazel heard a ragged, painful noise and realized it was her own breathing. Her side felt like it had been kicked in with a battering ram.

The G.o.ddess Hecate faced her. 'You should go now, Hazel Levesque. Lead your friends out of this place.'

Hazel gritted her teeth, trying to hold in her anger. 'Just like that? No "thank you"? No "good work"?'

The G.o.ddess tilted her head. Gale the weasel chittered maybe a goodbye, maybe a warning and disappeared in the folds of her mistress's skirts.

'You look in the wrong place for grat.i.tude,' Hecate said. 'As for "good work", that remains to be seen. Speed your way to Athens. Clytius was not wrong. The giants have risen all of them, stronger than ever. Gaia is on the very edge of waking. The Feast of Hope will be poorly named unless you arrive to stop her.'

The chamber rumbled. Another stela crashed to the floor and shattered.

'The House of Hades is unstable,' Hecate said. 'Leave now. We shall meet again.'

The G.o.ddess dissolved. The Mist evaporated.

'She's friendly,' Percy grumbled.

The others turned towards him and Annabeth, as if just realizing they were there.

'Dude.' Jason gave Percy a bear hug.

'Back from Tartarus!' Leo whooped. 'That's my peeps!'

Piper threw her arms around Annabeth and cried.

Frank ran to Hazel. He gently folded her arms around her. 'You're hurt,' he said.

'Ribs probably broken,' she admitted. 'But, Frank what happened to your arm?'

He managed a smile. 'Long story. We're alive. That's what matters.'

She was so giddy with relief it took her a moment to notice Nico, standing by himself, his expression full of pain and conflict.

'Hey,' she called to him, beckoning with her good arm.

He hesitated, then came over and kissed her forehead. 'I'm glad you're okay,' he said. 'The ghosts were right. Only one of us made it to the Doors of Death. You ... you would have made Dad proud.'

She smiled, cupping her hand gently to his face. 'We couldn't have defeated Clytius without you.'

She brushed her thumb under Nico's eye and wondered if he had been crying. She wanted so badly to understand what was going on with him what had happened to him over the last few weeks. After all they'd just been through, Hazel was more grateful than ever to have a brother.

Before she could say that, the ceiling shuddered. Cracks appeared in the remaining tiles. Columns of dust spilled down.

'We've got to get out of here,' Jason said. 'Uh, Frank ...?'

Frank shook his head. 'I think one favour from the dead is all I can manage today.'

'Wait, what?' Hazel asked.

Piper raised her eyebrows. 'Your unbelievable boyfriend called in a favour as a child of Mars. He summoned the spirits of some dead warriors, made them lead us here through ... um, well, I'm not sure, actually. The pa.s.sages of the dead? All I know is that it was very, very dark.'

To their left, a section of the wall split. Two ruby eyes from a carved stone skeleton popped out and rolled across the floor.

'We'll have to shadow-travel,' Hazel said.

Nico winced. 'Hazel, I can barely manage that with only myself. With seven more people '

'I'll help you.' She tried to sound confident. She'd never shadow-travelled before, had no idea if she could, but after working with the Mist, altering the Labyrinth she had to believe it was possible.

An entire section of tiles peeled loose from the ceiling.