Jagannath

The monster from your nightmares is HERE. It's destroying civilization. Soon the human race will be extinct.

Jagannath: a Hindu deity, literally "master of the universe."

An amorphous creature rises from the depths of Earth's oceans, develops a lust for human flesh and blood, assimilates its prey's intelligence, learns and grows as it feeds, and destroys civilization. Then it hunts the survivors down and torments them by metamorphosing into ghastly monsters from their darkest nightmares.