Mountain Kitsune, YamaKitsu

Mountain Tailed Magic:

You learn the cantrip Mold Earth. You learn the spell Earth Tremor and may cast it a number of time equal to your tails

Shapeshifter:

You can cast Mold Earth and Earth Tremor in fox form

Stubborn Fox:

As long as your feet are on the ground you cannot be knocked prone or force moved.