Farsighted

“I’m thinking of turning evil. Should I turn evil?”
Yes – definitely

“Will I need an evil army?”
Without a doubt

“Hmm. I’ll need fuel for an evil army. Trees burn, don’t they?”
Signs point to yes

“Haha. It’s not like the trees could fight back, right?”
Ask again later

That’s a palantír, by the way. If you didn’t know that, you’re probably a sane and well-adjusted individual. Congratulations.