Dragon, Sand Ancient (CR 21)

Huge Dragon (Earth)
Alignment: Always chaotic neutral
Initiative: +0; Senses: blindsense 60 ft., darkvision120 ft., low-light vision, keen senses, and tremorsense 60 ft.
Languages: Draconic

AC: 38 (-2 size, +30 natural), touch 8, flat-footed 38
Hit Dice: 33d12+180 (375 hp); DR: 15/magic
Fort +37, Ref +21, Will +28
Speed: 30 ft., burrow 20 ft., fly 150 ft. (clumsy)
Space: 20 ft./10 ft.
Base Attack +30; Grapple +50
Attack: 1 bite +40, 2 claws +35, 2 wings +35, 1 tail slap +35, 1 crush +35
Damage: 1 bite 2d8+12, 2 claws 2d6+6, 2 wings 1d8, 1 tail slap 2d6, 1 crush 2d8
Special Attacks/Actions: Breath weapon 18d4 (DC 31)
Abilities: Str 34, Dex 11, Con 23, Int 18, Wis 24, Cha 20
Special Qualities: Immunity to fire, Haboob, Dispel water, Wall of sand, Choking sands, Frightful Presence DC30, SR 26
Feats: #Feats: 12
Skills: Skill points: 138
Advancement: 31-32 HD
Climate/Terrain: Warm Deserts
Organization: Solitary (1 dragon, any age), clutch (1d4+1 wyrmlings, very young, young, juvenile, or young adults), family (pair of mature adults and 1d4+1 offspring)
Treasure/Possessions: Double Standard

Source: Sandstorm

Breath Weapon (Su): A sand dragon has one type of breath weapon, a cone of grit similar to a flaywind.

Spell-Like Abilities: At will - haboob; 3/day - dispel water, wall of sand; 1/day - choking sands.

Skills: Concentration, Hide, Intimidate, Listen, Move Silently, Sense Motive, Spot, and Survival are considered class skills for sand dragons.

Earth Subtype

This subtype usually is used for elementals and outsiders with a connection to the Elemental Plane of Earth. Earth creatures usually have burrow speeds, and most earth creatures can burrow through solid rock.