shadow_veil
...
It transformed.
Metal groaned. Panels shifted. Legs unfolded from wheels, and glowing red eyes sparked to life. Fifteen feet tall, silent as death, the machine raised an arm toward them.
"By the gods," Annabeth breathed.
Percy summoned Riptide, his pen flicking into a gleaming bronze sword.
And Callista?
She stepped forward, shadows coating her arms, legs and chest like armor. "You're not the first monster I've faced," she said softly, almost mockingly. "But you'll be the first I dismantle."
...
A crossover between two worlds, where Autobots and three young demigod's fall together in a blur of adventure, mystery and divine interventions. Callista, a quiet seventeen year-old hoped she could avoid prophecy-like life, but a daughter of Nyx could never rest, can she?
Enjoy the mix of tension, betrayals and secrets shared between these two kinds. Will they work out in the end, and save the planet they call home?