Polish extreme metallers BEHEMOTH have released the official music video for their cover version of the BATHORY classic ""The Return Of Darkness And Evil"".

The track is the official anthem of Poland's Mystic Festival 2026.

In a statement, frontman Adam 'Nergal' Darski shared his connection to the song: "'The Return Of Darkness And Evil' by BATHORY has always been a particularly important song for me...

When Michał Wardzała suggested that BEHEMOTH should create the anthem for Mystic Festival, I was game immediately." The band will perform at the Mystic Festival 2026 on Saturday, June 6 on the main stage.

The festival lineup also includes MEGADETH, BLACK LABEL SOCIETY, ANTHRAX, DOWN, MASTODON, ELECTRIC WIZARD, SAXON, BLOOD INCANTATION, ICE NINE KILLS, CAVALERA, OVERKILL, THE GATHERING, CARPENTER BRUT, BLOODYWOOD, CORROSION OF CONFORMITY, DECAPITATED, DEATH TO ALL, SIX FEET UNDER, STATIC-X, SCOUR, MARDUK, ROTTING CHRIST and CORONER.

The festival is organized by Mystic Coalition, an alliance of companies with vast experience in the concert, festival and recording market.