Frost Worm	CR 12
Usually N Huge Magical Beast (Cold) Init +4; Senses darkvision 60 ft., low-light vision; Listen +5, Spot +5 Languages —
AC 18, touch 8, flat-footed 18 (−2 size, +10 natural) hp 147 (14 HD) Immune cold Fort +14, Ref +9, Will +6 Weakness vulnerability to fire
Speed 30 ft., burrow 10 ft. Melee Bite +21 (2d8+12 plus 1d8 cold) Space 15 ft.; Reach 10 ft. Base Atk +14; Grp +30 Special Actions trill, breath weapon
Abilities Str 26, Dex 10, Con 20, Int 2, Wis 11, Cha 11 SQ death throes Feats Alertness, Improved Initiative, Improved Natural Attack (bite), Iron Will, Weapon Focus (bite) Skills Hide +3*, Listen +5, Spot +5 Advancement 15-21 HD (Huge); 22-42 HD (Gargantuan)
Breath Weapon (Su) 30-foot cone, once per hour, damage 15d6 cold, Reflex DC 22 half. Opponents held motionless by the frost worm's trill get no saving throw. The save DC is Constitution-based. Cold (Ex) A frost worm's body generates intense cold, causing opponents to take an extra 1d8 points of cold damage every time the creature succeeds on a bite attack. Creatures attacking a frost worm unarmed or with natural weapons take this same cold damage each time one of their attacks hits. Death Throes (Ex) When killed, a frost worm turns to ice and shatters in an explosion that deals 12d6 points of cold damage and 8d6 points of piercing damage to everything within 100 feet (Reflex half DC 22). The save DC is Constitution-based. Trill (Su) A frost worm can emit a noise that forces its prey to stand motionless. This sonic mind-affecting compulsion affects all creatures other than frost worms within a 100-foot radius. Creatures must succeed on a DC 17 Will save or be stunned for as long as the worm trills and for 1d4 rounds thereafter, even if they are attacked. However, if attacked or violently shaken (a full-round action), a victim is allowed another saving throw. Once a creature has resisted or broken the effect, it cannot be affected again by that same frost worm's trill for 24 hours. The effect's caster level is 14th. The save DC is Charisma-based. Skills *A frost worm, due to its coloration and its affinity for burying itself in the snow, has a +10 racial bonus on Hide checks in its native environment.

Frost Worm

CR 12

Usually N Huge Magical Beast (Cold)

Init +4; Senses darkvision 60 ft., low-light vision; Listen +5, Spot +5

Languages —

AC 18, touch 8, flat-footed 18
(−2 size, +10 natural)

hp 147 (14 HD)

Immune cold

Fort +14, Ref +9, Will +6

Weakness vulnerability to fire

Speed 30 ft., burrow 10 ft.

Melee Bite +21 (2d8+12 plus 1d8 cold)

Space 15 ft.; Reach 10 ft.

Base Atk +14; Grp +30

Special Actions trill, breath weapon

Abilities Str 26, Dex 10, Con 20, Int 2, Wis 11, Cha 11

SQ death throes

Feats Alertness, Improved Initiative, Improved Natural Attack (bite), Iron Will, Weapon Focus (bite)

Skills Hide +3*, Listen +5, Spot +5

Advancement 15-21 HD (Huge); 22-42 HD (Gargantuan)

Breath Weapon (Su) 30-foot cone, once per hour, damage 15d6 cold, Reflex DC 22 half. Opponents held motionless by the frost worm's trill get no saving throw. The save DC is Constitution-based.

Cold (Ex) A frost worm's body generates intense cold, causing opponents to take an extra 1d8 points of cold damage every time the creature succeeds on a bite attack. Creatures attacking a frost worm unarmed or with natural weapons take this same cold damage each time one of their attacks hits.

Death Throes (Ex) When killed, a frost worm turns to ice and shatters in an explosion that deals 12d6 points of cold damage and 8d6 points of piercing damage to everything within 100 feet (Reflex half DC 22). The save DC is Constitution-based.

Trill (Su) A frost worm can emit a noise that forces its prey to stand motionless. This sonic mind-affecting compulsion affects all creatures other than frost worms within a 100-foot radius. Creatures must succeed on a DC 17 Will save or be stunned for as long as the worm trills and for 1d4 rounds thereafter, even if they are attacked. However, if attacked or violently shaken (a full-round action), a victim is allowed another saving throw. Once a creature has resisted or broken the effect, it cannot be affected again by that same frost worm's trill for 24 hours. The effect's caster level is 14th. The save DC is Charisma-based.

Skills *A frost worm, due to its coloration and its affinity for burying itself in the snow, has a +10 racial bonus on Hide checks in its native environment.