Fantasy Monster: Pebblebulb

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Pebblebulb

A pile of pebbles hides a bulbous plant, half-buried in the ground.

CR 8; XP 4,800
N Medium Plant
Init +3; Senses low-light vision, tremorsense 120 ft.; Perception +23

Defense
AC 21, touch 13, flat-footed 18 (+3 Dex, +8 natural)
hp 102 (12d8+48)
Fort +12, Ref +7, Will +7
Defensive Abilities all-around vision; Immune plant traits

Offense
Speed 20 ft., burrow 10 ft.; stone walk
Melee 3 vine slam +14 (2d4+5)

Ranged 3 thrown pebble +12 (2d4+5)

Space 5 ft.; Reach 10 ft.

Special Attacks expel dust

Statistics
Str 20, Dex 16, Con 18, Int –, Wis 17, Cha 7
Base Atk +9; CMB +14; CMD 27 (can't be tripped)
Skills Perception +23, Stealth +23; Racial Modifiers +20 Perception, +20 Stealth

SQ compression, stone-boring

Ecology
Environment hills, mountains, ruins, underground
Organization solitary, pair or a patch (3–6)
Treasure standard

Expel Dust (Ex) After burrowing through stone, a pebblebulb stores some mineral dust in its bladders, that it can expel as a swift action, creating a 20-ft. radius, 10-ft. high cloud that lasts for 1d4+1 rounds. The irritating dust provides concealment, dazzles anyone with unprotected eyes, and induces cough in  breathing creatures that inhale it (holding breath or having some sort of mask that can filter dust protects against that effect). A failed Fortitude saving throw (DC 20) interrupts any standard or full action taken while breathing within the cloud. A pebblebulb can store enough dust for single expulsion. The saving throw DC is Constitution-based.

Stone-Boring (Ex) A pebblebulb borrowing through packed earth and stone leaves narrow tunnels behind.

Stone Walk (Ex) A pebblebulb can easily move through stony or sandy difficult terrain, such as unstable rubble.

A pebblebulb is a sturdy, stone-boring plant that thrives in rocky terrain, feeding on mineral dust occasionally fertilized by a rotting carcass.