Continue moving forward, and the Void will appear. After the cutscene ends, we can complete the quest "Void Illusion".
Jump down along the path on the left. There's a save point below, with Dust to the left.
Save your progress and head right. There's a challenge ahead. Approach the tree in front and interact with it.
After entering, you need to defeat three waves of enemies, each one stronger than the last. The combat is incredibly satisfying. The final wave features a Thornwild, fought using the same strategy as before.
Upon successfully completing the challenge, you will obtain the "Heart of the Banyan Tree".

