Sludge Jellies

Vile predatory sludges hide within the vents, drains
and ducts of the battlefield, waiting to envelop and
consume the unwary.
Any liquid terrain such as pools, puddles or toxic
spills might hide a Sludge Jelly; vents, ductways
and hatches might also hide these horrors. When
a fighter ends a Move action within 1"" of a piece
of liquid terrain or uses a ductway, vent or hatch,
roll a D6. On a 1, they have been attacked by a
Sludge Jelly.