It was clear where the urgency was: helping Neutemoc get to Mazatl. I sheathed my knife, ran to the shore, and pushed a boat into the water.

"You can't do it alone," Ezamahual said, behind me a climbing into the craft, taking the oars. "I'll row."

I nodded, and together we slowly got the boat out of the shallows, towards Neutemoc.

I turned, briefly. Teomitl had reached the same barge as the leading priest. The priest threw his hand up again; and the same light, expanding, covered Teomitl.

Teomitl grimaced. His face contorted in a painful struggle, and his grip on his sword slackened. He was going to die, like Ixtli a no...

But then a light as green as jade, as underwater depths, filled his eyes; and his features, softened by the inhuman light, became once again those of the goddess. The priest's spell fell around him harmlessly, shearing itself in two like a split obsidian mirror.

Teomitl shook his head, and walked forward, past the still body of Ixtli, smiling a smile even more terrible than the priest. His obsidian-studded sword was raised; and the leading priest had no weapon of his own, only magic that would have no effect on Teomitl.

Who are you?

Ahuizotl. He who bears Chalchiutlicue's gift. He who bears Her protection.

I turned away, keeping my gaze on Neutemoc. I did not see Teomitl's sword come down; but I heard the priest scream, a thin, reedy cry carried away by the wind; and then nothing, only the splashes made by the ahuizotls, and the soft raking noise of claws, tearing at flesh.

Ezamahual's quick rowing was bearing its fruit: we were slowly catching up with Neutemoc's and Palli's boat.

We were going to be too late, though.

Ahead of us, one of the creatures finally got past Palli's guard, and its claws raked the offering priest's arm. Palli fell to his knees in the boat, his face stretching into that familiar, terrible emptiness.

Now Neutemoc was defenceless. He did not give up. He went on rowing, intending to reach the ghost tree before the creatures could catch up on him.

It was never going to work... Never...

Ezamahual's oar-strokes quickened into a frenzy, but it wasn't going to be enough.

Ichtaca... Now or never.

And, for once, the Duality heard my prayer.

On the shore, Ichtaca laid both hands on the ground, and threw back his head with a triumphant scream. The circle blazed, spreading the Southern Hummingbird's light everywhere around the island, sinking into Ichtaca's flesh, outlining the bones of the priests in light.

The creatures, caught in the spell's hold, became paler and paler, vanishing altogether within the radiance.

It spread further, over the water a engulfing Ezamahual and me a reaching Neutemoc and Palli, and going on. For the briefest of moments, the ghost tree wavered and started to fade.

"No!" Mazatl screamed, in a voice that wasn't human any more. Magic poured out of him, going into the branches, sinking into the roots, and Huitzilpochtli's light finally faded into nothingness.

The ghost tree remained, but the creatures that had been clinging to its trunk were gone. And, on the island, not a single creature remained: just two stunned priests, taking care of the wounded, and Ichtaca, kneeling in his circle, breathing heavily.

"Do you think yourselves so clever?" Mazatl's voice was the hiss of a deadly snake.

From the tree's roots, a great cloud of magic spewed, roiling sickly as it merged with the water a higher and higher, until a huge wave travelled through the lake a aimed straight at us.

It reached Neutemoc's boat a fraction of a moment earlier than ours. I had time to see my brother pin Palli to the floor of the craft, and then the wave was upon us, an exhalation of water that sent us crashing into the warm lake.

TWENTY-THREE.

The Blessed Drowned I sank, my cloak filling with water, dragging me down like stone.

Under the water, everything was oddly quiet. Ahuizotls sang, far, far away, a gentle, soothing sound drawing me into Tlalocan. I hadn't had time to draw a good breath before sinking. My lungs burnt as I struggled to kick off my sandals, and undo the clasp of my cloak.

The fall into the lake had washed out the last remnants of the true sight: the water around me gradually became clearer a though I saw nothing but floating algae, and the light of the surface, far above me.

One of my sandals sank into the depths. A good start, but it wasn't enough.

For some incongruous reason, I thought of Huei, and of whether that was what she would feel when they drowned her. Would her gestures grow more and more sluggish as she sank to the bottom of the lake? Would she hear Chalchiutlicue's beasts summoning her to the bliss of the Land of the Drowned?

My hands slid over the clasp of my cloak, and finally prised it open. I kicked upwards, towards the light of the surface.

The rain was still falling when I emerged, gasping for breath. The lake was now scoured with angry waves. Nothing remained of the island save the stone altar, on which Ichtaca stood, directing the rescue of the priests who had fallen into the water. Teomitl was swimming on his back, surrounded by a ring of ahuizotls. He was holding onto Ixtli's still body, slowly, steadily pulling it towards the altar. Other ahuizotls dived into the depths, helping Ichtaca to get the priests out of the lake, though some of them were also feasting on the dead bodies.

An exhausted Ezamahual was clinging to the overturned boat; he blinked twice when he saw me, but didn't have the strength to do more.

And ahead...

Palli was still lying in the boat, unconscious. But there was no trace of Neutemoc.

Worry knifed my heart. I swam towards Palli's boat as fast as I could, took a deep breath a and dived into the depths of the lake.

The eerie underwater silence filled my ears once again. I swam downwards, with an ease akin to that of my childhood, keeping my eyes open in spite of the stinging touch of water.

Neutemoc...

Where in the Fifth World was he?

There should have been fish, or algae a even ahuizotls a but there was nothing. Just a spreading green light that gradually replaced the light of day a and, so close I could have touched them, the roots of the ghost tree, plunging towards the mud at the bottom: monstrous, shimmering things that seemed to beat with a life of their own. And, the deeper I swam, the larger they grew.

I had been swimming down for what seemed an eternity. Surely the lake was not that deep? It wasn't.

Surely, too a I should have run out of breath by now? I hadn't, either. But suddenly I knew why, and where the green light was coming from.

The time of the gods is not our own. And that was what I had strayed into by going so close to the ghost tree: to a different time, a distorted version of the Fifth World. The tree was a gate between Tlaloc's heartland and the Fifth World, pouring out the god's magic into the mortal world. Into the god-child Mazatl.

I tried not to worry about Mazatl. Neutemoc was the one I was worried about.

Neutemoc...

After what seemed an eternity, I saw a harsh glint, lost somewhere into the roots of the tree. It flashed on and off as I descended: the familiar, if toned-down, reflection of light on obsidian.

A macuahitl sword. It had to be a macuahitl sword. Please...

I found Neutemoc wedged into the ghost tree, one arm wrapped around a massive root, the other dangling, moved to and fro by the current. His face was pale, leached of all colour. His sword at his side was the only part of him that seemed to be alive: glinting coldly, malevolently in the green light.

With hands that seemed to have turned to tar, I disentangled him from the roots, pulling his body free from the tree with a wet, sucking sound, and passing his arm over my neck. Through all of it he didn't respond. Nor could I feel any heartbeat.

He wasn't dead. I hadn't died from falling in the water. He had to have survived. But he had fallen much closer to the ghost tree than I had, a treacherous thought whispered in my mind. I quelled it. I refused to listen to it, and focused on my leg-strokes a one, two, three a and on the light around me, pulsing as green as jade, as green as algae...

Neutemoc didn't stir, but grew heavier and heavier the higher I swam. Beside me, the ghost roots subtly changed, growing more and more solid, sending cold currents to wrap around my arms and legs.

Something tightened around us, sending chills through my bones. It wasn't anything material: more as if the water around me had suddenly contracted, growing colder and then warmer, like a heartbeat.

The light changed, became subtly dappled. Ahead of me, darker shapes broke the monotony of the water. Fish. I had reached the boundary of the Fifth World.

But, as I swam closer, I saw that they weren't fish at all a but bodies, their pale skin gleaming, their long hair streaming in the invisible currents. Their eyes were wide open, watching me impassively.

There were children: six, seven years old, their faces devoid of all expression, save for the tears running down their cheeks, inexplicably glistening in the water. There were women: young women with swollen skin, old women with a thin line of red circling their throats. And men, young and old, their skin as blue as unshed blood, their eyes bulging in their orbits.

The Blessed Drowned. The sacrifices to Tlaloc, to Chalchiutlicue, still weeping the tears that called down rain, still clutching their slit throats.

Neutemoc was heavier and heavier: not helping me, I thought, not without bitterness. If he became any heavier, I wouldn't be able to lift him and rise to the surface.

I kicked harder, knowing who I would see, at the end of this procession of the dead.

First was Eleuia, her empty eye-sockets still crying tears of blood; and etched on every feature of her face, the ruins of her beauty. Even pale and unmoving, even mutilated and reduced to this shadow of herself, her presence was still commanding a and she was still obscenely beautiful, she could still make me rigid with an alien desire.

She was singing, softly singing: "In Tlalocan, No hunger, but maize always blooming, always putting forth flowers; No pain, but the endless joy of the Blessed Drowned..."

I turned my eyes away from her, unable to bear her empty gaze.

And after Eleuiaa Like Neutemoc, he was entangled in the tree's roots, his face pale and colourless in the green light, both arms pulled back and wrapped around separate roots, making him into a living quincunx. Unlike Neutemoc, his eyes were wide open, staring at me, not with anger or with rage, but with a quiet, sorrowful disappointment that made my heart twist.

"Acatl," he whispered, and his voice was the water surging through the roots of the tree. A few handspans above us, the roots broke the water's surface: the Fifth World, so close and yet so unattainable.

"Father, I'm sorry," I whispered, as I swam closer. The words came out of my mouth in a trail of bubbles.

Father's eyes held me, shining in the ghastly pallor of his face. He didn't look blessed, or happy. Just disappointed. Sad. The same look his body had had, even in death.

"Father..." I couldn't speak. I couldn't make myself heard. Father just shook his head, and didn't answer me.

Neutemoc was a dead weight in my arms. I dragged him closer, struggling to reach Father's body. If only I could be close enough, so that he could read my lips. If only I could apologise a for the vigil, for Neutemoc...

For myself.

"You still do everything as if he were alive, don't you?" a mocking voice asked.

Slowly, I shifted around, half-turned away from the tree.

The child-god Mazatl hung in the water, a few measures away from me. Green light flowed around him, outlining his body and the white tunic he wore. And in the light stood a monstrous figure with dark eyes, laying His hands on the child's shoulder, His fanged mouth resting close to Mazatl's ears, whispering words that the child flung back at me.

"Tlaloc," I whispered. The acrid taste of the lake's water filled my mouth, and only a thin thread of sound came out.

"Mazatl," the child said, a bare whisper that was almost human. But then he was speaking again with Tlaloc's voice, a thunder that made the water shake around us. "Or rather, not any more. Now I am called Popoxatl."

The Strength of Rain.

"Well named," I whispered.