White magic spell

Prosperity spells do exist and work, however, it is the gods that decide how they will send you your prosperity. A lottery win is just one of thousands of ways they can and do cause the spells to manifest.

It is my experience that the harder you try to "force" a single solution (ie. a lottery win) the less likely it is to manifest.

If you want to use an ethical spell for prosperity, there are dozens, they are all much more likely to be successful than a specific (and somewhat less ethical) spell for a lottery win. Remember, the gods tend to help those who help themselves... and a lottery win is more of a serendipitous occurrence than a solution to a monetary problem.