Suffocating Crossing - Passive: Crossing the Blackwater Mire requires the party to complete a progress countdown (6). The route is unstable: hidden silt pockets, collapsing reed-mats, gas vents, and false channels.
PCs can use appropriate actions (navigation, survival, scouting, magic, teamwork) as agreed at the table.
On a successful roll, tick down the countdown by 1 (or more at GM discretion for especially clever play).
On a failure, the party still makes progress, but the GM triggers one Mire Hazard below or inflicts a cost (lost time, dampened supplies, attention drawn).

1. What do you do feel in the fog?
2. Who is watching the reflections instead of the path? Why?
3. What piece of gear are you most afraid of losing to the water?

Mire Hazard - Silt Suck - Action: Spend a fear to have the ground give way beneath a PC (or their pack/animal). They must make an agility reaction roll.

On a failure: they sink hard. They can be hauled out, but: lose an item, ruin a supply (tinder/food/rope), or mark a stress.
On a success: they scramble free, but mark 1 stress from the strain and panic.

Cold Look - Action: Spend a fear to let the mire’s chill seize a PC’s body—hands numb, breath shallow, joints stiff. They must make a presence or fortitude reaction roll (use what best fits your table’s fiction).

On a failure: mark 1 stress and they’re slowed (the next relevant roll suffers disadvantage / higher risk, per your table’s approach).
On a success: they push through, but lose time—tick the progress countdown down only if another PC takes the lead or they spend a resource (dry cloth, heat source, tonic).

Gas Bloom - Action: Spend a fear to release a pocket of marsh gas at the worst moment (near flame, during a rescue, or while crossing reeds). A PC must make an agility reaction roll.

On a failure: flame gutters or flares—lose a light source, ruin a supply, or draw attention (the next adversary encounter starts closer/tenser). Mark a Stress.
On a success: they smother it or back away in time, but the fog briefly thins—revealing something watching (a hint, not necessarily a fight).

The Lantern in the Reeds - Action: Spend a Fear to introduce a blinking lantern and a strapped pack on a post or half-sunk skiff.

It’s either a rescue (someone alive, trapped in silt) or bait set by a hunter that tracks sound and light.
If the party investigates carefully and succeeds, grant a Tier-1 reward (see below). If they rush, trigger Silt Suck immediately.

Who Lurks Nearby? - Action: Spend a Fear to summon one or more adversaries from the list above. They appear very close—a ripple behind reeds, a silhouette in fog, footsteps on a hidden boardwalk. They may not attack immediately; they might demand a price, stalk the party, or force a choice.