Tides of Darkness. Dragons of Vacari, #5

Beneath the tranquil waves of the Cerulean Expanse lies a world as vast and wondrous as any kingdom upon the surface. Coral palaces shimmer beneath the sea, ancient alliances endure, and noble dragons soar through the endless depths beside the civilizations they have sworn to protect. But something stirs where light cannot reach. When an ancient evil begins to rise from the abyss, the fragile peace of the underwater realms is shattered.
A terrifying creation, born from malice and unleashed with a single purpose, threatens to consume everything in its path. As long-forgotten powers awaken, the kingdoms of Coraluna and Luminaqua must stand united with the Bronze Dragons, the Amethyst Dragons, and their allies against a force unlike any they have ever faced. From the hidden ruins of Shadowhaven to the fathomless trenches of the ocean, loyalties will be tested, sacrifices demanded, and legends forged beneath the waves.
Even the might of Lysander, God of the Seas, may not be enough to halt the tide now rising against his domain. As the abyss reaches ever closer, the fate of the oceans-and perhaps all of Vacari-rests upon those willing to confront what waits below. Because some horrors were never meant to awaken.