Reborn as a Giant Beast: From the Start, I Become an Abyssal Mirage Dragon

[Behemoth Evolution + Invincible Mastermind + Cthulhu-esque Oppression]

Ten thousand meters beneath the sea, the Defense Bureau's hyperfrequency sonar shrieked wildly, churning the seabed into a noisy mire.

“The target exceeds the radar's size limit! It's moving!” The analyst's scream was drowned out by the piercing alarms.

Deep in the darkness of the abyss, a pair of molten-gold double pupils slowly lit up.

There was no roar, no declaration of war.

A casual sweep of its enormous blue-black armored tail sent ten thousand tons of seawater surging back, crushing a steel nuclear submarine like an empty can.

The defenses collapsed, and sea fog blotted out the sky.

As humanity watched in terror, the ancient god stretching across ten thousand meters slowly revealed its dragon horns, dragging the entire ocean into a lightless mirage realm.