I am wondering if
• living natural features = fey nature spirits
A tree and or a forest is a spirit. A wolf and or a pack is a spirit. Sometimes a collective concept can be a nature spirit distinguishable from an individual concept. It depends on what seems "significant".
• nonliving natural features = elemental spirits
So the sun is an elemental, an iceberg is an elemental, and so on. Of course, in the mind of animists, everything is a "living" being.
The problem is, these feys and elementals are right here in the Material Plane. There is no other plane elsewhere.
Animism is this-worldly. There is often not even a concept of "somewhere else".
Also there seems to be no meaningful difference between the spirit of a human and the spirit of a mountain and the spirit of the sky and the spirit of a plant. Indeed, even the spirit of a human can leave human life behind and become a spirit of a natural feature instead. Vice versa. Nature spirits can "immigrate" sotospeak. Immigrants are rare, but stories mention examples of them, leaving one community of spirits and becoming members of an other community of spirits. Note the "marriages" between members of different kinds of natural features. Often one spouse is an immigrant and becomes as if a different kind of nature spirit.
For D&D, the biggest challenge is to decide what is happening while the player character is being a mountain.
• living natural features = fey nature spirits
A tree and or a forest is a spirit. A wolf and or a pack is a spirit. Sometimes a collective concept can be a nature spirit distinguishable from an individual concept. It depends on what seems "significant".
• nonliving natural features = elemental spirits
So the sun is an elemental, an iceberg is an elemental, and so on. Of course, in the mind of animists, everything is a "living" being.
The problem is, these feys and elementals are right here in the Material Plane. There is no other plane elsewhere.
Animism is this-worldly. There is often not even a concept of "somewhere else".
Also there seems to be no meaningful difference between the spirit of a human and the spirit of a mountain and the spirit of the sky and the spirit of a plant. Indeed, even the spirit of a human can leave human life behind and become a spirit of a natural feature instead. Vice versa. Nature spirits can "immigrate" sotospeak. Immigrants are rare, but stories mention examples of them, leaving one community of spirits and becoming members of an other community of spirits. Note the "marriages" between members of different kinds of natural features. Often one spouse is an immigrant and becomes as if a different kind of nature spirit.
For D&D, the biggest challenge is to decide what is happening while the player character is being a mountain.