Mist-Stalker

Mist-Stalker
The Mist-Stalker is a terrifying and elusive monstrosity that roams the dark, damp root-labyrinth of The Shrouded Boughs. These creatures appear to be made of solidified fog and shifting shadows, their forms constantly flowing and re-forming as they move. They are the primary reason why Mist-Whisker sailors never travel alone and why Drift-Haven is so heavily fortified.
Mist-Stalkers are highly intelligent hunters that use the magical mist of the forest to their advantage. They can remain completely invisible while standing still in the fog, waiting for unsuspecting prey to drift by. They are said to be the vengeful spirits of sailors who were "Lost" within the Boughs, though the Mist-Weaver Coven claims they are natural guardians created by the forest itself.
Secret Motivation: The Mist-Stalkers are instinctively drawn to the rhythmic heartbeat of the Mother-Tree. They seek to "feed" on the aetheric energy that pulses through the roots, often causing localized "Mist-Breaches" where the protective fog becomes thin and unstable.
Adventure Hook: A pack of Mist-Stalkers has been sighted near the Echoing Grotto, behaving with unusual coordination. Seer Morwen believes they are being controlled by a powerful outside entity and asks the party to capture one of the creatures alive so she can study its connection to the mist.