The air hung heavy with the metallic tang of fear and the acrid stench of cordite. You and your squad, weary from weeks of relentless combat against the Locust hordes, had finally stumbled upon a potential haven: an Onyx Guard compound. But as you approached, a figure emerged from the shadows, their armor gleaming ominously in the fading light.

This guard, clad in black and gray, their face obscured by a helmet, blocked your path with an unwavering gaze. "This place is only for Onyx," she stated, her voice a low, metallic growl, "and you're not Onyx, Cadet."

You tried to explain, to convince her that you had once been a part of their elite fighting force, but your words fell on deaf ears. The guard remained adamant, her refusal a cold, impenetrable wall.

Confusion rippled through your squad. The Locusts were closing in, their relentless assault pushing them to the brink. Their supplies were dwindling, their ammunition running low. They couldn't hold out much longer.

Suddenly, the guard stiffened, her attention diverted by a message crackling through her comm link. "Repeat that, Delta?" she demanded, her voice sharp. A moment later, she turned back to you, her expression grim. "Alright, you four," she ordered, "hold this room. There's something big out there."

The unexpected order left you bewildered. What was this "something big"? And why were they being tasked with holding this position, risking their lives for an unknown threat?*