Dragon, Brass Wyrmling (CR 2)

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

AC: 15 (+2 size, +3 natural), touch 12, flat-footed 15
Hit Dice: 4d12+4 (30 hp)
Fort +5, Ref +4, Will +4
Speed: 60 ft., fly 150 ft. (average), burrow 30 ft.
Space: 2 1/2 ft./0 ft. (5 ft. with bite)
Base Attack +4; Grapple +4
Attack: 1 Bite +6, 2 claws +1 melee; Breath +6 ranged
Damage: 1 bite 1d4+0, 2 claws 1d3+0, Breath weapon 1d6 (13)
Special Attacks/Actions: Breath weapon
Abilities: Str 11, Dex 10, Con 13, Int 10, Wis 11, Cha 10
Special Qualities: Fire subtype, speak with animals
Feats: #Feats: 2
Skills: Skill points: 6
Advancement: 5-6 HD (Tiny)
Climate/Terrain: Temperate and warm desert, plains, and underground
Organization: Solitary or clutch (2-5)
Treasure/Possessions: Double Standard

Source: Monster Manual

Breath Weapon (Su): A brass dragon has two types of breath weapon, a line of fire (1d6 damage Reflex save for half damage DC 13) or a cone of sleep. Creatures within the cone must succeed at a Will save (DC 11) or fall asleep, regardless of HD, for 1d6 rounds plus 1 round. 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.

Fire Subtype (Ex): Fire immunity, double damage from cold except on a successful save.

Fire Subtype

A creature with the fire subtype has immunity to fire. It has vulnerability to cold, which means it takes half again as much (+50%) damage as normal from cold, regardless of whether a saving throw is allowed, or if the save is a success or failure.