While it's an incredibly old submission I'll just go over the same basic stuff as we do for everything:
- Lacks a proper description
- Lacks a proper map name ("Magic spells test" doesn't tell us much about the map, much less that it's complete for submission)
- Lacks a version number tied to either submission or the map itself
- Uses waits all over the place
- Leaks every location used
- Leaks every unit group used
- Uses "Begins casting" instead of "starts the effect of"
- None of the spells have any kind of configuration
- Spells with delayed effects are not MUI
- Spells shouldn't run sound files as part of them really
- No importing instructions to speak of (especially notable when sounds are used)
- Use "triggering unit" instead of "casting unit"
- Triggering unit referenced while a variable was already set to the triggering unit (First Magic 4)
- Special effect paths should be configurable
That should more or less cover all the issues I spotted (would need to see an updated work to identify further issues, if any)