So this seems like it’s structured similarly to the earlier “the hidden forest” storyline which gave us the three stone animal totems (Anamnecia, Vimino, and Acidien), and the three creatures (Renata, Salvatore, and Hortensia.). I think it might be a good idea to look up those details...
Here’s my guess:
Part 1:
Antidotes -> newborn sprites
Wind chimes -> forest compasses
Toxified spirits -> forest wisp
Expansion to air temple -> expansion to Acidien
Wind spirit fight -> enraged sloth fight
Tea with wind spirit -> Acidien tribute
Part 2:
Poisoned wood -> forest vines
Water compass -> forest blades
Expansion to water temple -> expansion to Vimino
? -> enraged rhino fight (199 hits)
? -> Vimino tribute (10 forest wisp essence, 35 dragon scales, 30 newborn sprite)
Part 3: (45 day timer on side goal for forest event)
? -> forest ore (sparkling mines and sawmills)
? -> forest lanterns (8 forest wisp, 5 forest vines, 45 forest ore)
Expansion to earth temple? -> expansion to Anamnecia (35 newborn sprites, 10 forest compasses, 10 forest blades, 20 forest lanterns)
? -> enraged elephant fight (299 hits)
? -> Anamnecia tribute (20 forest wisp essence, 25 Mithril, 50 newborn sprite)
And there is also a wealth of information about strategies, potential problems, drop rates, etc in the discussion thread for the hidden forest...