As a drummer, lyricist and singer, Zahler (under his stage name Czar) collaborates with his longtime friend Jeff Herriott (as JH Halberd) to write and perform songs as the heavy metal band Realmbuilder, who have three albums on Swedish label I Hate Records [REF].
Zahler also wrote the script for a 2011 horror film Asylum Blackout (also released as The Incident at Sans Asylum and The Incident), which was directed by Alexandre Courtès [REF].