Dragon, Brown Very Young (CR 4)
AC: 15 (-1 size, +6 natural), touch 9, flat-footed 15
Hit Dice: 9d12+27 (85 hp)
Fort +9, Ref +6, Will +7
Speed: 60 ft., burrow 60 ft.
Space: 10 ft./5 ft. (10 ft. with bite)
Base Attack +9; Grapple +17
Attack: 1 Bite +12, 2 claws +7, 2 wings +7 melee; Breath +12 ranged
Damage: 1 bite 2d6+4, 2 claws 1d8+2, 2 wings 1d6+2, 1 tail slap 1d8+6, Breath weapon 4d6 (17)
Special Attacks/Actions: Breath Weapon
Abilities: Str 19, Dex 10, Con 17, Int 12, Wis 13, Cha 12
Special Qualities: Acid immunity
Feats: #Feats: 4
Class Skills: Climb, Hide, Skill points: 15, and Survival
Advancement: 10-11 HD (Medium-size)
Climate/Terrain: Any desert
Organization: Solitary or clutch (2-5)
Treasure/Possessions: Double Standard
Breath Weapon (Su): The brown dragon's breath weapon is a line of acid. It does not use this attack against mounted foes, since it knows that horses are good eating. 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.
Tremorsense (Ex): Brown dragons can automatically sense the location of anything within 500 feet that is in contact with the ground.
Create Water (Sp): The dragon can use this spell-like ability once per day.
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.