The Leviathan's roar shook the cavern, its massive limbs smashing pillars of stone as it advanced. Dust and debris swirled in the chaotic air, illuminated by the eerie glow of Doom's magic.
Tony's mind raced, adrenaline surging through his veins. Steve stood firm, shield raised, ready to protect. Natasha circled, blades gleaming in the dim light.
Doom appeared atop a raised platform, his metallic mask glinting cruelly. "Behold the future — ruled by power, not heroism," he declared. "And Stark… you will witness your legacy crushed."
Tony's eyes burned with fury. "You're wrong, Doom. It's not power that makes a hero. It's heart."
Suddenly, Tony's HUD flickered. A hidden message appeared — a coded signal from an unexpected ally.
"Trust no one but yourself, Tony," the message warned. "There's a traitor here."
Shock ripped through him. Doom wasn't the only enemy.
The Leviathan lunged, but Steve threw his shield, striking the beast's armored hide with a resonant clang. Natasha darted forward, targeting weak points with precise strikes.
Tony activated his suit remotely, armor materializing around him in a brilliant flash of red and gold.
He soared into the fray, firing repulsor blasts to distract the Leviathan.
But as the battle raged, Tony's visor flickered — a glimpse of the face beneath the Iron Man armor on the enemy's side.
It wasn't Doom.
It was someone else. Someone who knew his deepest secrets.
The real nightmare was just beginning.