Relinquishing a Part of Myself to Die

Iron sharpens iron
I drive my tempered blade
Through the heart of my impurities
They may never die
But as long as I endure, I will never lose
A ritual metamorphosis
Bestowed with asceticism
In what I tie the scarlet cord onto
I only make back in endless potential
Get behind me, you toothless fiend
You now belong to this desert