Dragon, Amethyst Young (CR 6)
AC: 22 (+11 natural, +1 Dex), touch 12, flat-footed 21
Hit Dice: 12d12+24 (102 hp)
Fort +10, Ref +8, Will +9
Speed: 40 ft., fly 150 ft. (poor), burrow 20 ft., swim 10 ft.
Space: 5 ft./5 ft.
Base Attack +12; Grapple +15
Attack: 1 Bite +15, 2 claws +10, 2 wings +10 melee; Breath +15 ranged
Damage: 1 bite 1d8+3, 2 claws 1d6+1, 2 wings 1d4+1, Breath weapon 6d8 (18)
Special Attacks/Actions: Breath Weapon 6d8 (18)
Abilities: Str 17, Dex 12, Con 15, Int 12, Wis 13, Cha 12
Special Qualities: Force resistant, planar travel, poison immunity
Feats: #Feats: 5
Skills: Skill points: 18
Advancement: 13-14 HD (Medium-size)
Climate/Terrain: Inner Planes, underground
Organization: Solitary or clutch (2-5)
Treasure/Possessions: Double Standard
Monster Manual II
Bite: The dragon can use its bite snatch opponents. Bite attacks use the full attack bonus.
Claw: The dragon can use its claws to snatch opponents. Claw attacks are at -5 to the attack bonus.
Wing: The dragon can slam opponents with its wings, even when flying. Wing attacks are at -5 to the attack bonus.
Breath Weapon (Su): An amethyst dragon has one breath weapon, a line of concussive force (Reflex save for half damage, DC 18 6d8 damage). It can choose to deal subdual damage instead of normal damage. Using a breath weapon is a standard action. Once a dragon breathes, it can't breathe again until 1d4 rounds later. A blast from a breath weapon always starts at the dragon's mouth and extends in a direction of the dragon's choice.
Dragons ignore the frightful presence of other dragons.
Immunities (Ex): All dragons are immune to sleep and paralysis effects. Amethyst dragons are also immune to poison.
Spell Resistance (Ex): As dragons age, they become more resistant to spells and spell-like abilities, as listed in the variety descriptions
Blindsight (Ex): A dragon can ascertain creatures by non-visual means (mostly hearing and scent, but also by noticing vibration and other environmental clues) with a range of 90 feet.
Keen Senses (Ex): A dragon sees four times as well a human in low-light conditions and twice as well in normal light. It also has darkvision with a range of 300 feet.
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.