During the tutorial, after the player has been killed by Nomad, they can return to the soul obelisk and have a conversation with Zimberfizz. He reveals that Nomad caught him in a magic box then used him to transport building materials for the soul obelisk during its construction.
After Nomad's defeat during Nomad's Requiem, Zimberfizz adopts a new appearance, putting on a suit and top hat and taking over Soul Wars.
Zimberfizz is killed by an explosion during the investigation of Nomad's throne room at the beginning of Nomad's Elegy, and may either be replaced by Zanik or resurrected as a pile of ashes, depending upon the player's choice, upon completion of the quest.
Postbag from the Hedge
Zimberfizz answers a letter in the Postbag from the HedgeIssue 41, where he answers a question about where the souls go, stating that he believes Nomad to have a scheme for them.
In the Chaos Elemental's 13th letter in the same postbag, there is a paper which has "Hardens South" written on it. That is an anagram for "Use Shorthand" and the text appears to be written in Teeline Shorthand. The translation is "Uv b wd abt Sl Ws. Nmd is tb frd." Transcribed it says, "You've been warned about Soul Wars. Nomad is to be feared."
Before the release of Nomad's Requiem, Nomad would kill Zimberfizz every five seconds or so. Zimberfizz would reappear moments later, saying something like "I hate it when he does that!". Zimberfizz could also be attacked by players.