My contribution to #WorldMetalDay would be a song of one of my all time favourite bands: Skull Fist. If you get the chance, Go see them play.
I saw them as opener for Sabaton and Powerwolf back in 2010. I had never heard of them before, but they blew us out of the water and had a beer with us afterwards.
Just awesome NWCHM (yes, they Are Canadian which makes them even more loveable)