I was about to protest that I didn’t know, but the feather of truth kept me honest. The way was inside me—I’d seen it in Isis’s thoughts. I’d known what was coming ever since Anubis asked me that impossible question: “To save the world, would you sacrifice your father?”

“I don’t want to,” I said. “Please.”

“Osiris must take his throne,” my father said. “Through death, life. It is the only way. May Ma’at guide you, Sadie. I love you.”

And with that, his image dissipated.

Someone was calling my name.

I looked back and saw Zia trying to sit up, clutching weakly at her wand. “Sadie, what are you doing?”

All around us, the room was shaking. Cracks split the walls, as if a giant were using the pyramid as a punching bag.

How long had I been in a trance? I wasn’t sure, but I was out of time.

I closed my eyes and concentrated. The voice of Isis spoke almost immediately: Do you see now? Do you understand why I could not say more?

Anger built inside me, but I forced it down. We’ll talk about that later. Right now, we have a god to defeat.

I pictured myself stepping forward, merging with the soul of the goddess.

I’d shared power with Isis before, but this was different. My resolve, my anger, even my grief gave me confidence. I looked Isis straight in the eye (spiritually speaking), and we understood one another.

I saw her entire history—her early days grasping for power, using tricks and schemes to find the name of Ra. I saw her wedding with Osiris, her hopes and dreams for a new empire. Then I saw those dreams shattered by Set. I felt her anger and bitterness, her fierce pride and protectiveness for her young son, Horus. And I saw the pattern of her life repeating itself over and over again through the ages, through a thousand different hosts.

Gods have great power, Iskandar had said. But only humans have creativity, the power to change history.

I also felt my mother’s thoughts, like an imprint on the goddess’s memory: Ruby’s final moments and the choice she’d made. She’d given her life to start a chain of events. And the next move was mine.

“Sadie!” Zia called again, her voice weakening.

“I’m fine,” I said. “I’m going now.”

Zia studied my face, and obviously didn’t like what she saw. “You’re not fine. You’ve been badly shaken. Fighting Set in your condition would be suicide.”

“Don’t worry,” I said. “We have a plan.”

With that, I turned into a kite and flew up the airshaft towards the top of the pyramid.

Chapter 40. I Ruin a Rather Important Spell

I FOUND THAT THINGS WEREN’T GOING WELL UPSTAIRS.

Carter was a crumpled heap of chicken warrior on the slope of the pyramid. Set had just placed the capstone and was shouting, “Thirty seconds to sunrise!” In the cavern below, magicians from the House of Life waded through an army of demons, fighting a hopeless fight.

The scene would’ve been frightening enough, but now I saw it as Isis did. Like a crocodile with eyes at water level—seeing both below and above the surface—I saw the Duat entwined with the regular world. The demons had fiery souls in the Duat that made them look like an army of birthday candles. Where Carter stood in the mortal world, a falcon warrior stood in the Duat—not an avatar, but the real thing, with feathered head, sharp bloodstained beak, and gleaming black eyes. His sword rippled with golden light. As for Set—imagine a mountain of sand, doused with petrol, set on fire, spinning in the world’s largest blender. That’s what he looked like in the Duat—a column of destructive force so powerful that the stones at his feet bubbled and blistered.

I’m not sure what I looked like, but I felt powerful. The force of Ma’at coursed through me; the Divine Words were at my command. I was Sadie Kane, blood of the pharaohs. And I was Isis, goddess of magic, holder of the secret names.

As Carter struggled his way up the pyramid, Set gloated: “You can’t stop me by yourself, Horus—especially not in the desert, the source of my strength!”

“You’re right!” I called.

Set turned, and the look on his face was priceless. I raised my staff and wand, gathering my magic.

“Except that Horus is not alone,” I said. “And we’re not going to fight you in the desert.”

I slammed my staff against the stones and shouted, “Washington, D.C.!”

The pyramid shook. For a moment, nothing else happened.

Set seemed to realize what I was doing. He let out a nervous laugh. “Magic one-oh-one, Sadie Kane. You can’t open a portal during the Demon Days!”

“A mortal can’t,” I agreed. “But a goddess of magic can.”

Above us, the air crackled with lightning. The top of the cavern dissolved into a churning vortex of sand as large as the pyramid.

Demons stopped fighting and looked up in horror. Magicians stammered midspell, their faces slack with awe.

The vortex was so powerful that it ripped blocks off the pyramid and sucked them into the sand. And then, like a giant lid, the portal began to descend.

“No!” Set roared. He blasted the portal with flames, then turned on me and hurled stones and lightning, but it was too late. The portal swallowed us all.

The world seemed to flip upside down. For a heartbeat, I wondered if I’d made a terrible miscalculation—if Set’s pyramid would explode in the portal, and I’d spend eternity floating through the Duat as a billion little particles of Sadie sand. Then, with a sonic boom, we appeared in the cold morning air with a brilliant blue sky above us. Spread out below us were the snow-covered fields of the National Mall in Washington, D.C.

The red pyramid was still intact, but cracks had appeared on its surface. The gold capstone glowed, trying to maintain its magic, but we weren’t in Phoenix anymore. The pyramid had been ripped from its source of power, the desert, and in front us loomed the default gateway for North America, the tall white obelisk that was the most powerful focal point of Ma’at on the continent: the Washington Monument.

Set screamed something at me in Ancient Egyptian. I was fairly sure it wasn’t a compliment.

“I will rend your limbs from their sockets!” he shouted. “I will—”

“Die?” Carter suggested. He rose behind Set and swung his sword. The blade cut into Set’s armor at the ribs—not a killing blow, but enough to knock the Red God off balance and send him tumbling down the side of his pyramid. Carter bounded after him, and in the Duat I could see arcs of white energy pulsing from the Washington Monument to the Horus avatar, charging it with new power.

“The book, Sadie!” Carter shouted as he ran. “Do it now!”

I must’ve been dazed from summoning the portal, because Set understood what Carter was saying a lot faster than I did.

“No!” the Red God shouted. He charged towards me, but Carter intercepted him halfway up the slope.

He grappled with Set, holding him back. The stones of the pyramid cracked and crumbled under the weight of their godly forms. All around the base of the pyramid, demons and magicians who’d been pulled through the portal and knocked momentarily unconscious were starting to stir.

The book, Sadie...Sometimes it’s helpful to have someone other than yourself inside your head, because one can slap the other. Duh, the book!

I held out my hand and summoned the little blue tome we’d stolen from Paris: The Book of Overcoming Set. I unfolded the papyrus; the hieroglyphs were as clear as a nursery school primer. I called for the feather of truth, and instantly it appeared, glowing above the pages.

I began the spell, speaking the Divine Words, and my body rose into the air, hovering a few centimeters above the pyramid. I chanted the story of creation: the first mountain rising above the waters of chaos, the birth of the gods Ra, Geb, and Nut, the rise of Ma’at, and the first great empire of men, Egypt.

The Washington Monument began to glow as hieroglyphs appeared along its sides. The capstone gleamed silver.

Set tried to lash out at me, but Carter intercepted him. And the red pyramid began to break apart.

I thought about Amos and Zia, trapped inside under tons of stone, and I almost faltered, but my mother’s voice spoke in my mind: Stay focused, dearest. Watch for your enemy.

Yes, Isis said. Destroy him!

But somehow I knew that wasn’t what my mother meant. She was telling me to watch. Something important was about to happen.

Through the Duat, I saw magic forming around me, weaving a white sheen over the world, reinforcing Ma’at and expelling chaos. Carter and Set wrestled back and forth as huge chunks of the pyramid collapsed.

The feather of truth glowed, shining like a spotlight on the Red God. As I neared the end of the spell, my words began tearing Set’s form to shreds.

In the Duat, his fiery whirlwind was being stripped away, revealing a black-skinned, slimy thing like an emaciated Set animal—the evil essence of the god. But in the mortal world, occupying the same space, there stood a proud warrior in red armor, blazing with power and determined to fight to the death.

“I name you Set,” I chanted. “I name you Evil Day.”

With a thunderous roar, the pyramid imploded. Set fell crashing into the ruins. He tried to rise, but Carter swung his sword. Set barely had time to raise his staff. Their weapons crossed, and Horus slowly forced Set to one knee.

“Now, Sadie!” Carter yelled.

“You have been my enemy,” I chanted, “and a curse on the land.”

A line of white light shot down the length of the Washington Monument. It widened into a rift—a doorway between this world and the brilliant white abyss that would lock Set away, trapping his life force. Maybe not forever, but for a long, long time.

To complete the spell, I only had to speak one more line: “Deserving no mercy, an enemy of Ma’at, you are exiled beyond the earth.”

The line had to be spoken with absolute conviction. The feather of truth required it. And why shouldn’t I believe it? It was the truth. Set deserved no mercy. He was an enemy of Ma’at.

But I hesitated.

“Watch for your enemy,” my mother had said.

I looked towards the top of the monument, and in the Duat I saw chunks of pyramid flying skyward and the souls of demons lifting off like fireworks. As Set’s chaos magic dispersed, all the force that had been charging up, ready to destroy a continent, was being sucked into the clouds. And as I watched, the chaos tried to form a shape. It was like a red reflection of the Potomac—an enormous crimson river at least a mile long and a hundred meters wide. It writhed in the air, trying to become solid, and I felt its rage and bitterness. This was not what it had wanted. There was not enough power or chaos for its purpose. To form properly, it needed the death of millions, the wasting of an entire continent.

It was not a river. It was a snake.

“Sadie!” Carter yelled. “What are you waiting for?”

He couldn’t see it, I realized. No one could but me.

Set was on his knees, writhing and cursing as white energy encircled him, pulling him towards the rift. “Lost your stomach, witch?” he bellowed. Then he glared at Carter. “You see, Horus? Isis was always a coward. She could never complete the deed!”