The Forest Spirit is an enigmatic being said to be able to answer any question. While this is technically true, he answers nearly every question with “I don't know” rendering the ability a lot more mundane. As such, he ends up fairly useless in most encounters. I think a deep, powerful voice will work really well here. I'll probably end up adding echo effects to it.

(Line 1 context: this is his signature line, and I'd like it to be delivered with powerful confidence rather than snark. The 'don't' isn't heavily emphasized, but I think placing some emphasis there helps to relay the tone I'm going for.)

Line 1: I don't know.

Line 2: Who can say?

Line 3: They're also quite delicious!