Riven, the Fallen Guardian

The sky over Tokyo shone with an unreal glow.Suspended in the air, Riven seemed frozen in a nightmare. His eyes were no longer his own. His body levitated, wrapped in a dark, intangible aura. In the palm of his hand, a black scepter, like a shard of crystallized night, pulsed with an unhealthy light.
— It’s him… it really is him, whispered Mira.
Lyana didn’t answer. She watched. Riven seemed... different. Taller. Colder. His magic, once bright, had become unstable. Fractured.
— I’m going after him, declared Akaru.
He leapt. Sword in hand, he sliced the air… but a magical wave slammed him against an invisible wall.
— He’s attacking us! shouted Theo.
Riven made a simple gesture. A shadow blade shot from the sky, crashing just inches from the group. The ground trembled. Black cracks spread beneath their feet.
— That’s not him… Lyana whispered. Or what he has become is no longer Riven.
Riven stared at them one last second. Then his body disintegrated into dark particles and vanished in a flash.


Back at Hayato’s house, the atmosphere was icy.
— Explain, demanded Akaru. Now.
The professor didn’t flinch. He sat down, hands clasped.
— He is called the “Mirror Heart.” An entity born from the fracture between your two worlds. A spirit without a body, a will without memory. It latched onto Riven. Uses him as an anchor, as a host.
Theo clenched his fists.
— Can we free him?
— Maybe. But you’ll have to find the center of Inverso. The knot where the two worlds merge.
Mira looked up.
— And where is this center?
Hayato pointed at a map of Japan.
— Under Tokyo. Beneath you.