Nidhogg

Nidhogg is the Denizen resting below the Land of Horticulture and Essence. Legend tells of a way to purify Nidhogg. However, before you can get to working that out, you need to work out how to wake him (or you could let him sleep; they would much prefer you let him sleep). Once you've worked out how to wake Nidhogg, you will be presented with The Choice. Pick one of the three routes, and watch your destiny unfold. Between you and me, there's something in it for you if you purify him. But how to go about it? Maybe you should just... Plant more trees...