German Thesaurus

I just finished my first novel in scrivener and I really like it. But as I write in german I’m missing a great german thesaurus, even the one from MS Word is better. I can use the build in thesaurus from MacOs but its bad as well and even the extensions for the built in thesaurus like open thesaurus are not good.
Please team up, for example with Duden Korrektur, and provide a german thesaurus. Make it optional and I would pay for it, and I think a lot of other writers, too.
Style analysis, as Papyrus Author provides, would be great as well, but a great thesaurus I more important, it’s an essential tool for a writer.