Green Stalker
A Green Stalker is a wyld creature of the Faeywyld that prowls Aelfpaths of the Steel Realms and Laey Lines.
It can appear out of nowhere and strike travelers. Given the damaged state of the Aelpaths of Helca, these creatures have gradually died over time. Killed, though they are immortal for all intents and purposes.
Green Stalkers are found more in the north for an unknown reason, often enlisting the smaller faerie folk to aid in ambushing them mostly in spite now, instead of their usual mischievous approach.
A Blue Gris
The corrupted spirit of the Green Stalker is known as a Blue Gris. It is extracted from the Aelfpath by a summoner in a painful ritual. It appears as a smokey spirit of disease and death at this point.