D&D 5E - Immunity/Resistance to nonmagical attacks worth 50gp?

I don't think that its Finesse, and I don't think that you can use the -5/+10 ability of GWM with it.

Kensai and monks in general already automatically get the ability to bypass Magic-required resistance/immunity by the time the things they face tend to require it. They can also use Dex to hit and damage with any weapon they can pick.

Eh. Its pretty much always your DM's call about whether a particular magic item is available. I wouldn't suggest basing a character around a specific item unless you've already established that you'll be able to get one early on.

ncG1vNJzZmivp6x7prrWqKmlnF6kv6h706GpnpmUqHyqucyupaKsqWK%2Fpr%2FIrKuappOaerW7jKemp6WRnLakrctmmK2skZi4tHnWqKmtoF1qfai8jW9oaW1mbnw%3D