Dragon, White Wyrmling (CR 1)

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

AC: 14 (+2 size, +2 natural), touch 12, flat-footed 14
Hit Dice: 3d12+3 (22 hp)
Fort +4, Ref +3, Will +3
Speed: 60 ft., fly 150 ft. (average), swim 60 ft., burrow 30 ft.
Space: 2 1/2 ft./0 ft. (5 ft. with bite)
Base Attack +3; Grapple -5
Attack: 1 Bite +5, 2 claws +0 melee; Breath +5 ranged
Damage: 1 bite 1d4+0, 2 claws 1d3+0, Breath weapon 2d6 (12)
Special Attacks/Actions: Breath weapon
Abilities: Str 11, Dex 10, Con 13, Int 6, Wis 11, Cha 6
Special Qualities: Cold subtype, icewalking
Feats: #Feats: 2
Skills: Skill points: 1
Advancement: 4-5 HD (Tiny)
Climate/Terrain: Any cold land and underground
Organization: Solitary or clutch (2-5)
Treasure/Possessions: Double Standard

Source: Monster Manual

Breath Weapon (Su): A white dragon has one type of breath weapon, a cone of cold (1d6 cold damage, Reflex save for half damage DC 12). 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.

Cold Subtype

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