"[The Boundless Blade: the River Lethe]!" Pitch-black energy immediately spread outward and suppressed the exploding smoke. The huge sea of genetic energy covered up the skies of the world of black rain, the dark clouds, the rain itself.

The allied forces participating in the battle all looked up at the sky, whereupon they found it wholly replaced by a pitch-black ocean.

Waves surged forward, sounding like peals of thunder, like stampeding hooves. The surface of the sea frothed with angry waves, like dragons emerging with the tide. The entire sea roiled, and lightning crackled amidst the void.

Countless serpents swam across the raging sea as lightning flashed ominously overhead, a...