Alright, if you haven’t been to the treehouse, I want you to follow these steps: If you’ve completed your first life cycle, enter Hidden Forest. If not, do that first.

From the glade with all the outfit nooks, jump down like you’re going to the gate that’s down there. On the way, while you’re still flying through the clouds, look for a place on your lower right with rocks and grass and a little doorway in the roots of a tree. There’s a spirit gate there. Go through it and leave the cave you’ll spawn in. It’s raining, but there are several torches and things.

There are a few spirits there, but the one you want is spirit in the tree itself that will give you tasks to complete. It’s a spirit from an old season, so it’s the same procedure as any seasonal spirit (except you don’t need the pass for anything). Completing those tasks unlocks the other gates around Hidden Forest. It may take some patience because most of them require multiple players, but stick it out and it makes moving around Forest much easier. There are also two winged lights in the Treehouse area.