Ice Dragon
Gargantuan dragon, lawful good
Armor Class 18
Hit Points 175 (10d20) + 70
Speed walk 40 ft., fly 80 ft.
STR
27 (+8)
DEX
14 (+2)
CON
25 (+7)
INT
16 (+3)
WIS
15 (+2)
CHA
22 (+6)
Saving Throws Str +13, Con +12, Wis +7, Cha +11
Skills Arcana +8, Intimidation +11, Perception +7
Damage Resistances cold
Senses blindsight 60 ft., darkvision 120 ft., truesight 30 ft.
Languages Common, Draconic, Sylvan, Telepathy, telepathy 120 ft.
Challenge 15 (13,000 XP)
Frozen Scales. The Ice Dragon's scales are imbued with the essence of frost, granting it resistance to cold damage.
Icy Presence. Creatures within 10 feet of the Ice Dragon must succeed on a DC 19 Wisdom saving throw or be frightened until the end of their next turn.
Spellcasting. The Ice Dragon is a 10th-level spellcaster. Its spellcasting ability is Charisma (spell save DC 19, +11 to hit with spell attacks). It has the following sorcerer spells prepared:
Cantrips (at will): Frostbite
1st Level (4 slots): Ice Knife
2nd Level (3 slots): Hold Person
3rd Level (3 slots): Sleet Storm
4th Level (3 slots): Ice Storm
5th Level (1 slots): Cone of Cold
Actions
Multiattack. The Ice Dragon can make three attacks: one with its bite and two with its claws.
Bite. Melee Weapon Attack: +13 to hit, reach 15 ft., one target. Hit: 24 (3d10 + 8) piercing damage, plus 7 (2d6) cold damage.
Claw. Melee Weapon Attack: +13 to hit, reach 10 ft., up to 2 targets. Hit: 15 (2d6 + 8) slashing damage.
Icy Breath. The dragon exhales a freezing breath in a 60-foot cone. Each creature in that area must make a DC 19 Dexterity saving throw, taking 60 (10d10) cold damage on a failed save, or half as much damage on a successful one.