Black Svarpian
Climbing, you notice that the dirt and grass below your feet are giving way to pebbles and rock. Clearly you're getting high up on the hill. The dank air starts to smell a little better, a clear sign you're getting away from those swampy fumes. Still, the vegetation isn't letting up and you can't see the sky. There are a lot of shadows obscuring the path. You almost don't see it, but one of those shadows tries to slip away...

Quick! Don't let it get away!

Continue the climb to the top.
Or, take a detour to the right where the vegetation seems to grow sparser.