Young White Dragon
Hit Points 133 (14d10 + 56)
Speed 40 ft., burrow 20 ft., fly 80 ft., swim 40 ft.
Skills Perception +6, Stealth +3
Damage Immunities cold
Senses blindsight 30 ft., darkvision 120 ft., passive Perception 16
Languages Common, Draconic
Challenge 6 (2300 XP)
Ice Walk. The dragon can move across and climb icy surfaces without needing to make an ability check. Additionally, difficult terrain composed of ice or snow doesn't cost it extra moment.
Multiattack. The dragon makes three attacks: one with its bite and two with its claws.
Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 15 (2d10 + 4) piercing damage plus 4 (1d8) cold damage.
Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage.
Cold Breath (Recharge 5-6). The dragon exhales an icy blast in a 30-foot cone. Each creature in that area must make a DC 15 Constitution saving throw, taking 45 (10d8) cold damage on a failed save, or half as much damage on a successful one.