Burning Rockslide Hazard 2

Source Guilt of the Grave World pg. 64
Complexity Simple
Stealth DC 18 (trained)
Description Smoldering boulders are disgorged by the magmatic soil and roll down the slope, catching fire as they descend.
Disable DC 16 Nature (trained), Physical Science Lore (trained), or Survival (trained) to guess the rocks' path, or a DC 18 Acrobatics (trained), Athletics (trained) or a Fortitude save to deflect or dodge rocks.
Catching Fire [reaction] Trigger Creatures climb the slope; Effect Molten lava oozes down the slope, coming perilously close to the path and igniting the debris nearby—even the rocks. All creatures in a 30-foot burst take 1d10+4 bludgeoning damage and 1d10+4 fire damage with a DC 16 basic Reflex save. On a critical failure the creature also catches on fire.