Mentioned in issue 1 of Zzap!64 in its adventure column, this Mastervision (Mastertronic) title (originally released by Carnell Software) was certainly due out for the C64 and was even advertised for American audiences (see scans).
However, it never happened for reasons currently unknown, and only the ZX Spectrum version has managed to surface. Perhaps there were issues with the conversion?
We know little more at this stage, though oddly a sequel was due for release the same year called The Legacy of Light and was also due for the C64 and never saw release (on any platform).
Do you know anything more about it?