That was the easy part.

He'd made the long climb to the top of the ghyll, his feet sliding on the weathered stones despite his spiked climbing boots. He'd had to slide between the sentries posted by the Roses on the surrounding hills. The Wizard Houses of the Red and the White Rose had laid siege to Raven's Ghyll after the lord of the ghyll, Claude D'Orsay, betrayed them on the island of Second Sister.

At least Jason was in good shape, better than he'd ever been. Most wizards were soft, since they used magic to do the heavy lifting. Jason, on the other hand, had been training under the tender hand of Leander Hastings, who favored five-mile runs before breakfast. Jason was only seventeen and Hastings had been around for more than a century, but it still wasn't easy to keep up with the lean wizard.

Turning his back to the wind, creating a small shelter with his body, Jason lit a cigarette. Hastings was always on him about the smoking. But the risk seemed small compared to the danger he was in, here on the edge of the abyss.

He'd be lucky to make it to eighteen. For one thing, there was a good chance Hastings would kill him when he found out what he'd been up to.

Somewhere down below was D'Orsay, renegade wizard and holder of the fraudulent Covenant signed at Second Sister—the document that threatened to enslave them all.

D'Orsay was everything Jason was not: he was a cake-eater, born to privilege, former Master of the Game, heir of an aristocratic Wizard House. Jason was an underpowered street punk, a mixed-blood orphan holding a grudge.

Hopefully D'Orsay had no idea that bad news was coming down the hill toward him. Hopefully no one would expect an intruder on a night like this. Hopefully he could locate the Covenant and be away with it before anyone knew he was there.

If he couldn't find the Covenant, he'd look for D'Orsay's legendary hoard of weapons—the last legacy of Old Magic. That rumor was the only thing keeping the Roses at bay.

At the very least, he'd scope out D'Orsay's fortifications and find out how many wizards protected the ghyll. If he could succeed at any one of those things, Hastings might give him a longer leash.

At least he was doing something. Maybe Hastings was content to hang out in London, watching and waiting for somebody to jump. But there was nothing more boring than watching the Roses watch D'Orsay.

When Jason finished his cigarette, he shrugged into his backpack and began the painfully slow descent to the floor of the ghyll. To call it a trail was a stretch—he'd chosen it for its obscurity. D'Orsay couldn't possibly monitor every overgrown sheep track and hiking path that led into the ghyll.

Jason had hoped the weather would let up once he got below the shoulder of the peak, but the biting wind still slammed snow into his face and tugged at his extremities, threatening to rip him off the mountain.

Ahead, a yellowish mist shrouded the trail, close to the ground, strange for the weather and time of day. An odd color for any season. Jason eyed it warily, extended his gloved hand, and spoke a charm. Nothing. He didn't know if the problem was in the charm or in himself. Wasn't that Shakespeare?

He tried a couple more charms without success until the mist grudgingly yielded to his magic, dissolving to shreds that the wind carried away.

By now it was dark in the ghyll below, the peaks around him gilded with the last of the light. Lamps kindled in Raven's Ghyll Castle, at the far end of the valley. The dark shape of it bulked through the swirls of flakes and blowing snow.

He was able to move with greater speed as he neared the bottom, since the sharp verticals gave way to more gradual switchbacks. Until he rounded a corner and blundered into a mess—like a giant cobweb made of thick, translucent cords—nearly invisible in the failing light.

It was a Weirnet, a magical web made to capture the gifted. He tried to back out of it, but it was incredibly sticky, and every move embedded him further.

So much for a surprise attack. Jason forced himself into stillness, moving only his right arm, which he used to fish for his knife. Gripping the hilt, he pulled it free and sliced carefully at the tendrils within reach. The net parted reluctantly. It was designed to resist magic, and he wasn't doing much better with an actual blade.

Something bright streaked across the sky like a comet, then detonated at the height of its arc, flooding the ghyll with phosphorescent light.

Now the fun begins, Jason thought.

It took ten precious minutes to cut himself free. Even then, the opening was just broad enough to slide through.

He knew he should ditch the mission and get out while he could. But his entire life had been a string of bad decisions. He had no desire to slink back to Hastings with the same bad taste in his mouth he'd had since Leicester and D'Orsay killed his father.

He thrust his body through the breach. As he emerged, volleys of wizard flame erupted from the hillside above, and he flung himself sideways. He scrambled on hands and knees into a grove of trees, then turned to look.

All around him, black-clad wizards slipped through the forest, directing withering fire toward the tear in the web.

Jason considered his options. If D'Orsay was smart (and he was), he would stay barricaded inside the hold until the all-clear. D'Orsay's hoard of magical pieces would be in the keep, too. Along with the Covenant that made D'Orsay ruler of all the magical guilds.

To the castle, then. But best not to be noticed.

Jason stuffed his fingers under his coat and pulled out a circlet of dull stone engraved with runes. It was a dyrne sefa, meaning secret heart, an amulet of power. Despite the cold, it was hot to the touch, steaming in the brittle air, drawing power from the nearby Weirstone. Stroking the surface with his fingertips, he spoke a charm.

Now rendered unnoticeable, Jason threaded through the woods and across the open meadow of the valley floor toward the castle. Away from the shelter of the ghyll walls, the wind assaulted him again. But now he was impervious to the cold, ignited with power and determination.

The meadow was studded with wind-seared brush, powdered with fine, dry snow, and fissured with ravines. The need to mind his footing warred with the desire to peer about like a tourist.

These must be the tournament fields.

Here the blood of generations of warriors had been shed in ritual battles that allocated power to the Wizard Houses. Here the warriors Jack Swift and Ellen Stephenson had fought the tournament that broke the original Covenant and challenged the power of the Roses.

Here the sanctuary of Trinity was born.

More than anything, Jason wanted to make the same kind of mark on the world.

Wizard flares rocketed into the air, lighting the ghyll as if it were midday. Trees went up like torches, sending smoke roiling into the sky. Jason guessed he should be flattered at the intensity of the response to his trespassing. It was like using a shotgun against a gnat. Still the snow fell, glittering in impossible colors as the light struck it.

Ahead loomed the castle, a forbidding stone structure that might have been hewn from the side of the mountain. Terraced gardens surrounded it, littered with the skeletons of winter-dead plants, like the leavings of a failed fair-weather civilization.

Squadrons of wizards charged up and down the valley, magical shields fixed in place, splattering power in all directions. Some passed within a few feet of him, glowing white ghosts in hooded, snow-powdered parkas. Jason continued his stubborn march on the hold.

He'd hoped they'd give up, assuming their intruder had fled. But no. D'Orsay's wizards gathered near the castle, forming a broad phalanx of bristling power. Charms were spoken, and a great wall of poisonous green vapor rolled toward him across the meadow.

Chemical warfare, wizard style.

Swearing softly, Jason disabled the unnoticeable charm so he could use other magic. He extended his hand and tried to reproduce the charm he'd used on the yellow mist. Either he got it wrong, or he simply wasn't strong enough. The cloud kept coming, relentlessly swallowing trees and stones and fleeing animals. There'd be nothing left alive in the ghyll by morning.

His only hope was to get above the cloud. Jason turned, sprinted for the Ravenshead, and began to climb. As the way grew steeper, he had to reach high to find handholds above his head, desperately hauling himself up by insinuating his body into crevices and wedging his feet into the imperfections that marred the stone face of the mountain.

About the time he thought his lungs would burst, he reached a ledge just below the Weirstone and shoved his body up and over. He lay facedown in the snow until he caught his breath, then pulled himself to his feet.

The ghyll below was a sea of mist, a vast polluted cesspool that lapped higher and higher on the surrounding slopes.

Then the earthquakes began. Thunder rumbled through the ghyll, and the stones under Jason's feet rippled like an out-of-control skateboard. The mountain shifted and shuddered, trying to fling him off. Boulders crashed down from above, shaken loose from ancient perches high on the slopes, bouncing past him and disappearing into the sea of mist at the bottom. This was more than wizard mischief. It seemed…apocalyptic.

Jason crouched back against Ravenshead, his arms wrapped around his head to fend off falling debris, his gaze drawn back to the blue flame of the Weirstone.

It loomed above his head, a faceted crystal the blue-green color of the deepest and clearest ocean. With the stone so near, blood surged through his body, intoxicating him, heating him down to his fingers and toes. Power battered him from all sides, vibrating in his bones like a crashing bass from a magical band.

As he watched, a jagged crack opened in the solid rock face above him. It yawned wider and wider, a raw gash in the shadow of the stone. Small stones and grit stung his skin and he squeezed his eyes shut to avoid being blinded.

Gradually, the earth quieted and the stone dimmed. Jason opened his eyes. He crept forward and peered over the edge of the rock. The green mist was still inching up the slope.

He sat back on his heels, eyeing the new-made cave. Cool air, flowing from under the Weirstone, kissed his face. Maybe he could worm deeper into the mountain until the mist subsided. Seeing no other choice, he plunged into the opening.

The air was surprisingly fresh to have been bottled up in the mountain for so long. Jason collected light on the tips of his fingers, a makeshift lamp to show the way. As he snaked back into the rock, it became clear that the quake had reopened a cave hewn out of the mountain in centuries past. Scattered across the stone floor was evidence of prior occupation: the bones of large animals, shards of pottery, and metal fittings.