If you aren’t familiar with Koronal then you’re truly missing out on some punishing grooves. These guys are a progressive/djent band out of Poland. They kind of remind me of a mix between Meshuggah and Tool with their low tuned syncopated grooves and haunting ambient guitar leads. The one factor that sets them apart are their death metal style vocals. Check out the music video for “Usurper” below off of their debut record Flicker Away.