Duneshaker Solifugid
CREATURE 18The largest solifugids, duneshakers, are so immense that their movements make the terrain around them tremble. They can prey on creatures the size of mammoths or even larger.
Tremorsense allows a monster to feel the vibrations through a solid surface caused by movement. It is an imprecise sense with a limited range (listed in the ability). Tremorsense functions only if the monster is on the same surface as the subject, and only if the subject is moving along (or burrowing through) the surface.
Each turn, the first time the duneshaker solifugid is adjacent to a Large or smaller creature during a move action it's using, that creature must succeed at a DC 39 Reflex save or fall Prone.
The duneshaker solifugid spews toxic barbs at all creatures in a 30-foot cone. Each creature within the area takes 10d6 poison damage (DC 39 basic Fortitude save). A creature that fails its saving throw is Blinded for 1d6 rounds (or permanently on a critical failure).
The duneshaker solifugid can't use Venom Spray again for 1d4 rounds.