Swedish hardhitter Per Karlsson (Örebro, 1973) names Sadus, Atheist, Death, Confessor, Death Angel, Annihilator, Dark Angel, Possessed, Grotesque, Motley Crue, Therion, Slayer, Demolition Hammer and Morbid Angel as musical influences.



As Nasum's initial drummer Rickard Alriksson did not want to play live, the band asked Per Karlsson - former drummer in Swedish deathsters Suffer and nowadays fulltime member in Serpent and In Aeternum - as a session drummer for their debut live show. He accepted the conditions and played with Nasum on their live debut in Åstorp, Sweden, 16 September 1995.



As Nasum wanted to play more shows, Rickard Alriksson departed from the band. And as Karlsson had obligations elsewhere, he could not join as a permanent member. Hence a new drummer, Jallo Lehto, was tested as a replacement. It did not work out very well, and after some consideration guitarist Anders Jakobson took the empty place behind the drums.