Metal songs

Okay, this one blew me away. What formula are you using? Seems I can't just say great, but it is freaking GREAT! Your others are awesome as well. Just can't type as much as required, so just know I am in awe of you. Now for some poetry...

“Hope” is the thing with feathers -
That perches in the soul -
And sings the tune without the words -
And never stops - at all -

And sweetest - in the Gale - is heard -
And sore must be the storm -
That could abash the little Bird
That kept so many warm -

I’ve heard it in the chillest land -
And on the strangest Sea -
Yet - never - in Extremity,
It asked a crumb - of me.