Tangallion World of Colossi

Witness now the collapse of Mankind.
It is not of nature, nor was it doomed from the start,
Rather, beware of these:
The core and ruler of the forest,
The subterranean hunter,
The gravedigger of sea life,
The insane epicenter of the blizzard,
The ravenous death that is skybound,
The one who bears antediluvian anger,
The elusive and nightmarish eidolon,
And the tenebrous and absurdly gigantic ruler of Tangallion,
Its three moons and what little else lies beyond, Ruin.