He carefully extracted that part and placed it into a specially-made small bottle.
The liquid shimmered faintly in the bottle, like a star trapped in confinement.
Then, he began processing the other materials, wholly absorbed in the complex and delicate process.
Just as Ron was fully focused on the experiment, a slight rustling sound interrupted his thoughts.
He looked up to see the tree spirit using vines to form a few words in the air: "A guest has arrived."
Ron was somewhat surprised; he hadn't expected the tree spirit to communicate in this manner.
For the past few days, it remained nearly as silent as a sculpture, leading him to assume it was just a simple, thoughtless being.
"Thank you for the warning." He nodded at the tree spirit, carefully sealing his experiment for the time being: "Keep an eye on these for me, I'll be right back."
The tree spirit nodded in understanding, its vines gently retracting, continuing its nearly statue-like stillness.