Fantasy Monster: Voracious Turf

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Voracious Turf

This patch of lawn looks weirdly suspicious... Wait... Why is it moving?! Why is it moving so faaaaassttt?!! Get it off of me!

CR 12; XP 19,200
N Colossal Plant

Init +1; Senses blind and deaf, lifesense 120 ft., tremorsense 120 ft.; Perception +25

Defense
AC 27, touch 3, flat-footed 26 (+1 Dex, +24 natural, –8 size)
hp 170 (20d8+80)
Fort +16; Ref +7; Will +11

Defensive Abilities always suffer half damage from effects that allow a Reflex saving throw for half; DR 10/slashing; Immune plant traits; Resist acid 10, cold 10, electricity 10, fire 10

Offense
Speed 30 ft.

Melee none

Space 30 ft.; Reach 0 ft.

Special Attack crushing trample (10d8, DC 21)

Statistics
Str 30, Dex 13, Con 18, Int –, Wis 19, Cha 1
Base Atk +15; CMB +33; CMD 44 (can't be tripped or forcibly moved)

Skills Perception +25, Stealth +21; Racial Modifiers +20 Perception, +20 Stealth

SQ too big to notice

Ecology
Environment cold and warm plains and forest glades
Organization solitary, pair, meadow (3—9)
Treasure standard

Special Abilities

Crushing Trample (Ex) A voracious turf can move over any number of Large or smaller creatures and obstacles as a full-round action (a staggered voracious turf can move attempt crushing trample moving up to half of its speed as a standard action). Any creature that is within the area over which voracious turf moves may either make an attack of opportunity against the turf or attempt a Reflex saving throw (DC 21) to avoid being run over and crushed. Creatures that succeed their saving throw are pushed to the sides or front of moving voracious turf. Creatures that failed their Reflex saving throw or never attempted it, are crushed for 10d8 points of bludgeoning damage, immobilized prone underneath the voracious turf, and forced to hold their breath. On their turn they can attempt to escape as a full-round action by making a successful Escape Artist or grapple check against the voracious turf's CMD, or a Reflex saving throw against DC of 21. Alternatively, they can attempt to attack the turf with light weapons held, cast spells or use other abilities if they make a concentration check (treating crushing damage of this ability as continuous effect), or do nothing to save their breath. On its turn, voracious turf can deal crushing damage to all creatures already underneath it instead of taking any actions (even especially if it would be unable of taking any actions for some reason). The saving throw DC is Dexterity-based.

Too Big To Notice (Ex) A voracious turf is exceptionally flat for a colossal creature, ignoring size penalty to Stealth checks. It cannot move over Large obstacles, though, nor can it move through the space occupied by other specimens of its kind.

Voracious turf is a colony of motile grass, taking the form of a big moving patch of turf, with the grass roots intertwined with soil and clay, and extensive muscle-like fibers carrying it around like thousands of legs.

Voracious turfs often migrate in search of better quality soils—which they tend to degrade quite fast. Crushing other living creatures, animal and plant alike, into pulpy mush helps fertilize the soil for a time, delaying turf migrations.