The Mirror Dimension was a silent, lonely prison. Leo and Ashem were completely immersed in their task, the only sound in the entire, endless space the soft whoosh of their arms as they traced circles in the air, over and over again.
For what felt like an eternity, Leo's attempts yielded nothing but a pathetic fizzle of sparks. Each try was a blind stab in the dark, and he never even came close to finding the door. He glanced at Ashem. She, the legendary master of all disciplines, was faring no better. Her progress was, frustratingly, identical to his own. They were two travelers, lost in a cosmic fog, their anxiety and helplessness mounting with each passing minute.
The anxiety burned in Leo's chest like a raging fire. He could feel the clock ticking. The Marvel world was on the verge of chaos. The First was being consumed by light. The Ancient One had placed her faith in him, and Ashem carried the hopes of her entire world. If he couldn't even master the first, most basic lesson, what good was he?
"Okay, all-powerful Ashem," Leo said, letting his arms drop in exasperation. "You're a master of, like, everything. Is there a trick you're not telling me? Some secret technique for learning new magic? Because normal people can't just pick up dozens of different skills!"
Ashem tilted her head, a lost look in her ruby eyes, her tail swishing restlessly behind her. She traced another circle, which produced another sad puff of sparks.
Leo pressed a hand to his forehead and sighed. "Right. Never mind. Your situation isn't any better than mine."
"It's because the worlds are different," she said, finally coming back to herself. "The magic I'm learning now… it feels completely alien to everything I've ever known. I think even the underlying logic is wrong."
"The underlying logic is different?"
Her words struck Leo like a flash of lightning. A fleeting spark of an idea. He furrowed his brow, his mind racing, carefully replaying every memory he had of magic in the Marvel Universe, every word of the Ancient One's lecture.
"The ancient ones draw energy from other universes through incantations…""Chanting incantations… drawing energy…"
He was circling the key, he could feel it, but it remained just out of reach, separated from him by the thinnest of veils. Fine beads of sweat formed on his forehead.
Ashem, watching him struggle and growing more frustrated with her own repeated failures, finally let her annoyance boil over. "Didn't you already open a portal once?!" she blurted out, her voice sharp with irritation. "The one in the apartment! Is there nothing in common between that and this?"
Her complaint was the final key.
"Commonality?" Leo whispered, his mind flashing back to the feeling of opening that first, explosive portal. He remembered the drain, the feeling of a power that wasn't his own surging through him. He remembered looking at Ashem.
His eyes went wide. "It's the energy," he said, a slow, brilliant grin spreading across his face. "I understand!"
He took a deep breath, raised his hand, and drew the circle again. This time, his movements were steady, confident. And this time, it was different. Instead of a feeble spark, a bright, fiery line was left hanging in the air where his finger had passed, the orange-yellow glow dancing like a living flame. The line of fire wove itself into a complex pattern of geometric shapes and glowing runes, a complete magic circle, stable and powerful, hovering before them.
He looked at the shimmering sigil, his face flushed with the joy of discovery. "It's just like before," he explained excitedly to Ashem. "When I opened the portal in the apartment, you were the one paying the energy cost." He pointed to the Sling Ring on his hand. "This ring isn't for casting the spell. It's the power source! It's a key that lets us draw energy from other universes to fuel the magic!"
"Oh," Ashem said, blinking. She looked at the ring on her own hand with a strange expression. "So, all this time, I've been trying to push my own Aether into it…" She groaned. "You're telling me I've basically been trying to charge a battery by plugging it into itself?"
Leo waved his hand, and the magic circle dissolved into a shower of light. "Honestly," he said with a laugh, "the fact that you were doing the complete reverse operation and still managed to make sparks is probably the most incredible thing I've seen all day."
Following his advice, Ashem tried again. This time, instead of pushing her own energy out, she focused on pulling energy in through the ring. Instantly, a brilliant, stable magic circle, identical to Leo's, blazed to life before her. A joyful smile lit up her face, and her tail began to wag happily. "It worked! First try!"
Leo stroked his chin, his mind still working. "The magic the Ancient One teaches… let's call it dimensional magic. Its main feature is absorbing external energy. The default 'other universe' energy makes orange sparks. But when Doctor Strange uses the Time Stone, the magic is green. When Kaecilius used Dormammu's power—"
"Are you going to stand there muttering all day?" Ashem interrupted, bouncing on the balls of her feet. "Or are we going to try the portal? I can't wait to try this for real!"
"Wait," Leo said, holding up a hand. "Now that we know the principle, we have a much better power source than just 'some random universe'." He reached into his pocket and pulled out the orange-yellow crystal, the sun symbol at its core glowing with a warm, steady light.
Ashem understood immediately. She stepped forward and clasped her hand over his, their fingers wrapping around the crystal together. Following the Ancient One's instructions, they raised their joined hands and began to draw a circle in the air.
"See through the interference," Leo said softly, his eyes filled with a fierce determination. "Picture Kamar-Taj."
The result was instantaneous and explosive. A torrent of sparks, hotter and more dazzlingly brilliant than anything the Ancient One had produced, erupted from their hands. It wasn't the color of fire; it was the color of the sun. The light swiftly carved a perfect, stable doorway to Kamar-Taj into the fabric of the Mirror Dimension.
On the other side, the Ancient One and Mordo were waiting. A joyful, appreciative smile lit up her face.
Mordo, however, saw something else. For a fleeting instant, he saw the symbol of the sun flash in both their pupils, and he could feel the raw, unusual heat radiating from their portal.
As Leo and Ashem stepped through, Mordo stepped forward, his expression severe, his tone questioning. "Did you truly accomplish this with your own power alone?"
"Mordo," the Ancient One said, placing a calming hand on his arm. "I know your concerns. But Leo and Ashem have their own power to draw upon." She smiled at him, then at her new students. "The proof is before you. They possess an extraordinary talent."
Mordo looked from his master to the two newcomers, then back to the fading, sun-bright portal. Doubt still lingered in his mind, but the facts were undeniable. He gave a stiff, formal nod, forced to admit that this time, the Ancient One's assessment of her students might just be accurate.