# Half-Earth Elemental Spinewyrm
*Huge Magical Beast (Earth)*  
**Challenge Rating:** 17

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## Hit Dice
**16d10+96** (184 hp)

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## Initiative
+0

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## Speed
30 ft., burrow 20 ft.; **earth glide**

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## Armor Class
**29** (–2 size, +0 Dex, +21 natural)  
Touch 8, flat-footed 29

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## Base Attack / Grapple
+16 / +32

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## Attack
Bite +22 melee (2d8+12)

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## Full Attack
Bite +22 melee (2d8+12)  
Tail slap +20 melee (2d6+6)

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## Space / Reach
15 ft. / 10 ft.

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## Special Attacks

**Poison Spines (Ex)**  
Injury; Fort DC **26**; initial and secondary damage **1d6 Con**  
DC = 10 + ½ HD (8) + Con modifier (8)

**Spine Volley (Ex)**  
As base spinewyrm; unchanged

**Earth Mastery (Ex)**  
The spinewyrm gains a +1 bonus on attack and damage rolls if both it and its opponent are touching the ground.

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## Special Qualities

- Darkvision 60 ft.  
- Low-light vision  
- Tremorsense 60 ft.  

**Earth Glide (Su)**  
The spinewyrm can move through stone, dirt, or earth as easily as a fish moves through water. It leaves no tunnel or trace.

**Damage Reduction:** 10/adamantine  

**Elemental Immunities:**  
Immune to sleep, paralysis, and poison effects

**Acid Resistance:** 20

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## Saves
- Fort +18  
- Ref +10  
- Will +7  

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## Abilities

| Ability | Score |
|-------|------:|
| Strength | 33 |
| Dexterity | 10 |
| Constitution | 27 |
| Intelligence | 2 |
| Wisdom | 12 |
| Charisma | 6 |

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## Skills
Listen +19, Spot +19, Survival +17

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## Feats
Power Attack  
Improved Natural Attack (bite)  
Multiattack  
Weapon Focus (bite)  
Awesome Blow  
Improved Bull Rush  

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## Environment
Warm deserts, rocky badlands, silt margins

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## Organization
Solitary

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## Alignment
Always neutral

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## Advancement
None (maximum Hit Dice reached)