Xemn Worzen (ぜムン・ウォーゼン) is played in the area of the dungeon best suited for exploration by Xemn Worzen, the father of the Drasle family. The NES and MSX versions of the song are very similar.
The title is translated from Japanese on the official MSX soundtrack.
Legacy of the Wizard (NES)
Xemn Worzen's theme for the NES has a richer sound then the MSX version. The song is track 2 in the NSF file and plays on the RP2A03.
Dragon Slayer IV: Drasle Family (MSX)
The MSX version is a little slower and plays at a higher pitch. The percussion is more muted and the bridge of the song doesn't feature the whistle. The song is track 2 in the KSS file and is played on the AY-3-8910 on the MSX and the identical-sounding YM2149 on the MSX2.