The watcher beneath the waves

Far beyond the dying waves that make landfall,
Within the dark depths of unseen mystery,
A watcher in the water observes mankind,
With deathlike white eyes, unmoved, but all-seeing,
An ancient enigma waiting below the surface,
Formerly of cosmic residence, now held in a watery cell,
The watcher enters dreams, accumulating secrets,
Existing beneath the dark waves for aeons,
Ready to arise when summoned,
To spread madness and doom upon the earth.