Dragon, Copper Young Adult (CR 10)

Large Dragon (Earth)
Alignment: Always Chaotic Good
Initiative: +0; Senses: blindsense 60 ft., darkvision120 ft., low-light vision, and keen senses
Languages: Draconic

AC: 25 (-1 size, +16 natural), touch 9, flat-footed 25
Hit Dice: 17d12+51 (161 hp); DR: 5/magic
Fort +13, Ref +10, Will +13
Speed: 40 ft., fly 150 ft. (poor)
Space: 10 ft./5 ft. (10 ft. with bite)
Base Attack +17; Grapple +25
Attack: 1 Bite +20, 2 claws +15, 2 wings +15, 1 Tail Slap +15, 1 crush +15 melee; Breath +20 ranged
Damage: 1 bite 2d6+4, 2 claws 1d8+2, 2 wings 1d6+2, 1 tail slap 1d8+6, Breath weapon 10d4 (21)
Special Attacks/Actions: Breath Weapon, fear (DC 21), SR 19
Abilities: Str 19, Dex 10, Con 17, Int 16, Wis 17, Cha 16
Special Qualities: Acid immunity, spider climb, CL 5, *Can also cast cleric spells and those from the Chaos, Earth, and Trickery domains as arcane spells.
Feats: #Feats: 6
Skills: Skill points: 57
Advancement: 18-19 HD (Large)
Climate/Terrain: Temperate and warm desert, hill, mountains, and underground
Organization: Solitary or clutch (2-5)
Treasure/Possessions: Double Standard

Source: Monster Manual

Breath Weapon (Su): A copper dragon has two types of breath weapon, a line of acid (10d4 damage Reflex save for half damage DC 21) or a cone of slow gas. Creatures within the must succeed at a Fortitude save (DC 21) or be slowed for 1d6 rounds plus 5 rounds. 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.

Frightful Presence (Ex): A young adult or older dragon can unsettle foes with its mere presence. The ability takes effect automatically whenever the dragon attacks, charges, or flies overhead. Creatures within a radius of 150 feet are subject to the effect if they have fewer HD than the dragon (17).

A potentially affected creature that succeeds at a Will save (DC 21) remains immune to that dragon's frightful presence for one day. On a failure, creatures with 4 or fewer HD become panicked for 4d6 rounds and those with 5 or more HD become shaken for 4d6 rounds.

Dragons ignore the frightful presence of other 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.