Vileplant is profoundly affected by the environment, but Deadly Vileplant, far larger and evolved, should possesss a more solid clue. Accordingly, eliminate the Deadly Vileplants on the 2nd floor and obtain Deadly Vileplant's Leaf. 110 should be sufficient.
Huh? Why's its leaves and not pollen this time? I told you, Deadly Vileplant particularily its highly sensitive leaves, is the key to how the monsters here grew stronger instead of going down the path of self-destruction.
That oaf Xian must've been unaware of it. Vileplant's Pollen... What a waste of time. Go on. I have other investigations to conduct