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 movement.

Multiattack. The dragon makes three attacks: one with its bite and two with its claws.

Charge: If the dragonkin moves at least 20 ft. straight toward a target and then hits it with a lance Attack on the same turn, the target takes an extra 17 (5d6) piercing damage. If the target is a creature, it must succeed on a DC 14 Strength saving throw or be pushed up to 10 ft. away and knocked prone.

Lance. Melee Weapon Attack: +7 to hit, reach 15 ft., one target. Hit: 26 (5d6+ 8) piercing damage.

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.