First of all the title grabbed me. It's strong.
I personally think you could strengthen the lyric by rewording anything that isn't appropriate for all ages.
Any reference to "killing" or "demons", to me makes the song almost unlistenable. However, I think there are better words for certain moments.
here are my suggestions/ideas
"I'm living illen and [repelling] the villains that fill in the chilling."
"Messenger letting ya get in the set of [horrors]."
"[Driving] delusions of movements [out] through time which seems to be idyllic." or "[Conquering] delusions of movements through time which seems to be idyllic." or "[Diffusing/dissipating/dispersing] delusions of movements through time which seems to be idyllic."
"Not a screaming [hellion] or beaming visions of leading heathens even."
Here are the parts I like the most:
"Yet not forgetting that I let in the setting that's hot and wrecking yet in.
Every second betting I've never met him and I will get him.
Cretin that's heading towards my mind I find I'm blind.
To the guy that's behind the fine design and I will try to fly high." Great delivery here.
"Revealing the meaning of living easy I'm chilling."
"Of a million children beginning a spinning meaning."
With a suggested change: "Now I'm sitting and hitting the written [spat] that I'm spitting." I think curse words generally reduce the value of a song, unless completely necessary, especially if there are better, stronger words.
I think you might be over-rhyming; it's hard to tell though, because I haven't heard it. Maybe it doesn't need to rhyme quite as much to be just as good or better.
I hope this advice helps!