Martin Axenrot's first band, Triumphator, formed in 1995 and made 2 records (an EP "The Ultimate Sacrifice" and full length "Wings of Antichrist"). Martin Axenrot was only involved with Triumphator's demo "The Triumph Of Satan", released 1996. He left Triumphator after the release of "The Triumph Of Satan".
In 1999, he became a member of Witchery and Nifelheim. In 2004 he joined Bloodbath as their new drummer after Dan Swanö that continued in the band as one of the guitarist and songwriters. He met Mikael Åkerfeldt sometime after 15 February 2005, when Peter Tägtgren quit Bloodbath and Åkerfeldt came back into the band again to replace Tägtgren. Axenrot commented on meeting Åkerfeldt, stating "I knew Mikael Åkerfeldt because of the Bloodbath project. I met the other members a couple times because I played festivals with other bands at the same time as Opeth. Sweden is too small to not know every band here. Everybody knows everybody." On 29 August 2005, Martin Lopez of Opeth, had to leave the band temporarily again due to his illnesses. With Opeth temporarily searching for a drummer, Patrik Jensen suggested to Åkerfeldt his bandmate in Witchery, Axe, to fill-in. With Åkerfeldt knowing Axe for a little bit by being bandmates in Bloodbath back then, but going on Jensen's reference, Åkerfeldt got Axe to play with Opeth for five tours. On May 12, 2006, Axenrot officially joined Opeth, as Lopez never returned to Opeth after deciding to focus on Soen.