From Pathfinder Society Scenario #3-11: No Time for Treason, which isn't enabled.

Living Landslide (PFS 3-11)

CREATURE 5

Living landslides resemble humanoids made of earth and gravel.

Earth elementals make excellent bodyguards for adventuresome spelunkers and are ideal protectors of important subterranean locations such as vaults and treasuries.

Perception +12; darkvision, tremorsense (imprecise) 60 feet

Languages Petran

Skills Athletics +14, Stealth +8

Str +5, Dex -1, Con +4, Int -2, Wis +1, Cha -1

Tremorsense (Imprecise) 60 feet

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.

Earthbound

When not touching solid ground, the living landslide is Slowed 1 and can't use reactions.

AC 21; Fort +15, Ref +8, Will +10

HP 90; Immunities bleed, paralyzed, poison, sleep

Crumble

Trigger The living landslide takes damage from a hostile source while atop rock or earth.

Effect The living landslide crumbles into the ground, Burrowing down 10 feet. This Burrowing does not trigger reactions.

The living landslide can't Crumble again for 1d4 rounds.

Speed 25 feet, burrow 25 feet; earth glide

Melee Fist +16 (reach 10, unarmed), Damage 2d8+8 bludgeoning

Earth Glide

The living landslide can Burrow through any earthen matter, including rock. When it does so, the living landslide moves at its full burrow Speed, leaving no tunnels or signs of its passing.

Pathfinder Society Scenario #3-11: No Time for TreasonOGL