Converging Mists CR 5
Persistent NE haunt (100 ft. by 15 ft. avenue)
Caster Level 5th
Notice Perception DC 11 (to see the mist forming as walls)
hp 16; Trigger proximity; Reset 1 day
Effect When the converging mists haunt is triggered, fog forms behind and around the creatures within its area before condensing into walls. The converging mists haunt continues to form these walls, leading creatures towards the closest graveyard; any creature attempting to breach these walls gets lost in the fog for 1d3+1 rounds, stumbling back out in the same square they entered into. While within the converging mists walls a creature takes 1d4 cold damage each round (DC 15 Will save halves damage and allows the creature to pass through the fog).
Destruction The converging mists haunt can only be destroyed permanently by casting a spell that can create 20 mph winds as you spread powdered diamonds (worth 100 gp) into the word.
Adventure Hook While traversing inhospitable terrain, the converging mists haunt is sent out by a powerful being such as a lich, vengeful spirits, and possible a goblin shaman looking to lure unsuspecting travelers to their den, nest, or lair.
[The converging mists haunt is from contributor Tim Snow!]