Ancient Silver Dragon
Gargantuan Dragon, Lawful Good
AC 22
HP 468 ()
Speed 40 ft., Fly 80 ft.
Saving Throws DEX , WIS
Skills History , Perception , Stealth
Immunities Cold
Senses Darkvision 120 ft., Blindsight 60 ft., Passive Perception 26
Languages Common, Draconic
CR 23 (XP 50,000; PB +7)
Traits
Legendary Resistance (4/Day, or 5/Day in Lair). If the dragon fails a saving throw, it can choose to succeed instead.
Actions
Multiattack. The dragon makes three Rend attacks. It can replace one attack with a use of (A) Paralyzing Breath or (B) Spellcasting to cast Ice Knife (level 2 version).
Rend. Melee Attack Roll: , reach 15 ft. Hit: 19 () Slashing damage plus 9 () Cold damage.
Cold Breath (Recharge 5–6). Constitution Saving Throw: DC 24, each creature in a 90-foot Cone. Failure: 67 () Cold damage. Success: Half damage.
Paralyzing Breath. Constitution Saving Throw: DC 24, each creature in a 90-foot Cone. First Failure: The target has the Incapacitated condition until the end of its next turn, when it repeats the save. Second Failure: The target has the Paralyzed condition, and it repeats the save at the end of each of its turns, ending the effect on itself on a success. After 1 minute, it succeeds automatically.
Spellcasting. The dragon casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC 23, +15 to hit with spell attacks):
Legendary Actions
Chill. The dragon uses Spellcasting to cast Hold Monster. The dragon can’t take this action again until the start of its next turn.
Cold Gale. Dexterity Saving Throw: DC 23, each creature in a 60-foot-long, 10-foot-wide Line. Failure: 14 () Cold damage, and the target is pushed up to 30 feet straight away from the dragon. Success: Half damage only. Failure or Success: The dragon can’t take this action again until the start of its next turn.
Pounce. The dragon moves up to half its Speed, and it makes one Rend attack.