Help me find this song!

[u/thee_allien]

I think it was by an indie (supergroup?) band from around 2015ish. I only remember the music video being black and white, possibly slo-mo, of people lined up on a battlefield then charging. Maybe they were vikings? For some reason my brain always wants to say massive attack, but that is not it.

[u/PitifulHistory1057]

Woodkid - iron?