Quicksand

Complex Environmental

Stealth +12 (trained) (or –10 and no minimum proficiency if the surface is disturbed)

Disable DC 18 Survival (trained) to disturb the surface

Submerge [Free Action]

Routine (1 action) On its initiative, the quicksand pulls down each creature within it. A creature that was submerged up to its waist becomes submerged up to its neck, and a creature that was submerged up to its neck is pulled under and has to hold its breath to avoid suffocation.

A creature in the quicksand can attempt a DC 20 Athletics check to Swim to either raise itself by one step if it’s submerged to its neck or worse, or to move 5 feet if it’s submerged only up to its waist. On a critical failure, the creature is pulled down one step.