Green Svarpian
As you travel deeper into the swamp, you find yourself into a  thicket of soft green vegetation. The leaves cling to your clothes but don't really restrict your movement as the branches are soft and pliable. Up ahead these branches seem to form an archway or tunnel. On all other sides you're surrounded by shades of green.
Suddenly some of the green blinks and you're surprised to find a light green svarpian staring at you. 

Hurry! Feed it before it slithers away!

Head through the archway
Or, decide you've had enough and return to the Hollow Tree.