I heard Hierro for the first time as a demo made by Okko and it became immediately one of my favorite songs. Hierro is like a compressed miniature portrait of Bajo Cero:fragile in a certain sense, but includes a lot of strength. The song starts acoustically and minimaly but the intensity grows through the whole song and in the end everything is at full blast. It has to be mentioned about the singing that even if you didn’t understand the lyrics, you can’t help but listen to Anna’s intensive interpretation.
As a player I’ve always enjoyed the most of those kind of songs that make you forget that you’re playing and you just focus on the feeling of the song. Hierro is one of these songs. You get sucked into the atmosphere of the song immediately and I think the song works best when listened your eyes closed and your head set on (preferably the same kind of head set that Anna uses in the music video of the song). Hierro is also a great song played live. The whole band obviously enjoys playing it and at least for myself Hierro is always one of the highlights in the show.