Arcane Worm

Arcane Worm
Creature statistics
XP Value 2,500
Treasure Type IV
Type Insectoid - Aberration
Size Very Large
Climate/Terrain Desert
Frequency Very Rare
Number Appearing 1
Movement Speed Fast
Hit Points 36 (10d6+1)
Defense Score 5
Defense Target 4+
Melee Attack Score Bite 7
Attack Target 3+
On Hit Poison (Type B) 5+
Melee Attack Score Tail Swipe 6
Attack Target 3+
Reach 35 feet
On Hit Stun 5+
Tactics Double Attack (3)
Preemptive Attack 3+
Immunity Enchantment, Poison
Resistance Fire (50% damage)
Weakness Ice (200% damage)

“The Arcane Worm is a massive, solitary predator that haunts the most remote corners of the desert. Buried deep beneath the sands, it lies in wait; not for sound or movement, but for the pulse of magic. Spellcasters and enchanted items can draw its wrath. When it strikes, it bursts from the dunes in an explosion of fury, its gaping mouth wide enough to swallow a medium-sized creature whole. Those who carry magic into the deep desert often vanish without a trace, claimed by the silent horror beneath the sands…”

...from the Wyrmbrand's Monstrous Archive entry 'Vermis Arcanumi'
More Info...

An Ambush From Below...

The Arcane Worm is a somewhat docile creature that survives by eating smaller insectoids and organisms beneath the desert sands.

But the massive worm will burst forth from beneath the surface if it senses magical items or spell-casters traveling upon the surface above its burrow, directly attacking magic users first with its venomous bite...

Attributes

Ability scores
STR 7 (4)
VIT 7 (4)
DEX 5 (3)
INT 1 (1)
WIS 4 (2)
CHA 2 (1)
Additional scores
Initiative 3
Awareness 2
Morale N/A