I agree with the above posts. Aside from giving the challenge an unpredictable twist, you painted a world where demons leap from shredded ground, and then angels are hailed from the sky to give the Dark Ones a whooping. Greatness.
Although I do have some constructive criticism if you have the characters left: -Split that last chunk into two pargraphs - Capitalize ‘two’ is the second sentence of the second paragraph.
’Tis all. Wonderful story! Thanks for participating.