H-hey, what, am I supposed to conjure up a riddle of my own now? Uh... Right, here goes nothin'. Though I don't know the initial rules, I'll aim for four lines, which may or may not rhyme in any recognized way. *Think, think* *Think, think*

In the darkest depths of past sins
Lies both heaven and guardian of hell
No matter who wins
The light of day will not prevail

Ok, some poetic license, but I doubt you'll find it difficult. I'll try to check in before tomorrow evening, my timezone, but I make no guarantee.