Ancient Silver Dragon

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: +17, reach 15 ft. Hit: 19 (2d8 + 10) Slashing damage plus 9 (2d8) Cold damage.

Cold Breath (Recharge 5–6)

Constitution Saving Throw: DC 24, each creature in a 90-foot Cone. Failure: 67 (15d8) Cold damage. Success: Half damage.

Paralyzing Breath

Constitution Saving Throw: DC 24, each creature in a 90-foot Cone. Failure: The target has the Incapacitated condition until the end of its next turn, when it repeats the save. 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.

Legendary action uses: 3 (4 in its lair). The creature can use one option at the end of another creature’s turn and regains spent uses at the start of its turn.

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 (4d6) Cold damage, and the target is pushed up to 30 feet straight away from the dragon. Success: Half damage only. Success or Failure: 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.

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):

At will: Detect Magic, Hold Monster, Ice Knife (level 2 version), Shapechange (Beast or Humanoid form only, no Temporary Hit Points gained from the spell, and no Concentration or Temporary Hit Points required to maintain the spell)

1/day each: Control Weather, Ice Storm (level 7 version), Teleport, Zone of Truth

Regional effects

The region containing an adult or ancient silver dragon's lair is changed by its magic, creating the following effects:

• Gentle Gusts: Winds buoy creatures that fall within 1 mile of the lair. Such creatures descend at a rate of 60 feet per round and take no damage from falling.
• Sun and Storms: While in its lair, the dragon can cast Control Weather, requiring no Material components and using the same spellcasting ability as its Spellcasting action.

If the dragon dies or moves its lair elsewhere, these effects end immediately.