The dust swirled thick in the crumbling chamber as the mysterious figure stepped from the shadows — tall, cloaked, and radiating a chilling aura that made even the Leviathan hesitate.
Tony's eyes narrowed beneath his helmet. "Who the hell are you?"
The figure's voice was a cold whisper, slicing through the chaos: "I am the consequence of your past mistakes, Stark. The reckoning you never saw coming."
Pepper, still struggling against the dark magic, looked up at the stranger, confusion flickering in her eyes.
Steve tightened his grip on his shield, stepping protectively in front of her. "We don't want more enemies."
The shadow laughed, a sound devoid of warmth. "Enemies? No, Captain — I'm the endgame you didn't prepare for."
Before anyone could react, the figure raised a hand, and with a flick, the Leviathan staggered, its monstrous form faltering as unseen chains of dark energy bound it.
Tony's HUD flashed warnings: "Unknown energy source detected. Level: Extreme."
Natasha hissed, "This guy's no joke."
Tony gritted his teeth. "Looks like we just got a new boss fight."
The chamber's cracks widened, dust and stones falling faster now.
Tony glanced at Pepper, who was still caught in the magical grasp. "Hold on, Pepper. I'm not letting you go."
The shadow advanced, every step a threat, every breath a promise of destruction.
The final battle had begun — not just for survival, but for the fate of everything Tony Stark had ever fought for.