Klauth

From Storm King's Thunder, page 95.

**Hit Points:** 546 (28d20 + 252)
 **STR**
30 (+10)
10 (0)
29 (+9)
18 (+4)
15 (+2)
 **Saving Throws:** Dex +7, Con +16, Wis +9, Cha +13
**Skills:** Perception +16, Stealth +7
**Damage Immunities:** fire
**Senses:** blindsight 60 ft., darkvision 120 ft., passive Perception 26
**Languages:** Common, Draconic
 ***Dual Wand Wielder.*** If Klauth is carrying two wands, he can use an action to expend 1 charge from each wand, triggering the effects of both wands simultaneously.
***Innate Spellcasting.*** Klauth's spellcasting ability is Charisma (spell save DC 22). He can innately cast the following spells, requiring no material components:
*1/day:* Banishment, Etherealness, Find the Path, Locate Object, Prismatic Spray, Suggestion
***Legendary Resistance (3/Day).*** If Klauth fails a saving throw, he can choose to succeed instead.
***Special Equipment.*** Klauth carries a Wand of Fireballs and a Wand of Lightning Bolts, and he wears a Ring of Cold Resistance.
***Spellcasting.*** Klauth is a 14th-level spellcaster. His spellcasting ability is Intelligence (spell save DC 20 +12 to hit with spell attacks). He has the following wizard spells prepared:
*Cantrips (at will):* Mage Hand, Mending, Minor Illusion, Prestidigitation
*1st level (4 slots):* Comprehend Languages, Detect Magic, Expeditious Retreat, Identify
*2nd level (3 slots):* Darkness, Detect Thoughts, Melf's Acid Arrow
*3rd level (3 slots):* Clairvoyance, Haste, Nondetection
*4th level (3 slots):* Greater Invisibility, Ice Storm, Stoneskin
*5th level (2 slots):* Bigby's Hand, Cloudkill, Scrying
*6th level (1 slot):* Disintegrate, Mass Suggestion
 ***Multiattack.*** Klauth can use his Frightful Presence. He then makes three attacks: one with his bite and two with his claws.
***Bite.** Melee Weapon Attack:* +17 to hit, reach 15 ft., one target. *Hit:* 21 (2d10 + 10) piercing damage plus 14 (4d6) fire damage.
***Claw.** Melee Weapon Attack:* +17 to hit, reach 10 ft., one target. *Hit:* 17 (2d6 + 10) slashing damage.
***Tail.** Melee Weapon Attack:* +17 to hit, reach 20 ft., one target. *Hit:* 19 (2d8 + 10) bludgeoning damage.
***Frightful Presence.*** Each creature of Klauth's choice that is within 120 feet of Klauth and aware of him must succeed on a DC 21 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to Klauth's Frightful Presence for the next 24 hours.
 Klauth can take 3 legendary actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of another creature's turn. Klauth regains spent legendary actions at the start of its turn.
**Detect.** Klauth makes a Wisdom (Perception) check.
**Tail Attack.** Klauth makes a tail attack.
 On initiative count 20 (losing initiative ties), Klauth takes a lair action to cause one of the following effects; Klauth can't use the same effect two rounds in a row:
* Magma erupts from a point on the ground the dragon can see within 120 feet of it, creating a 20-foot-high, 5-foot-radius geyser. Each creature in the geyser's area must make a DC 15 Dexterity saving throw, taking 21 (6d6) fire damage on a failed save, or half as much damage on a successful one.
* A tremor shakes the lair in a 60-foot radius around the dragon. Each creature other than the dragon on the ground in that area must succeed on a DC 15 Dexterity saving throw or be knocked prone.
 The region surrounding Klauth's lair is warped by Klauth's magic, which creates one or more of the following effects:
* Small earthquakes are common within 6 miles of the dragon's lair.
* Water sources within 1 mile of the lair are supernaturally warm and tainted by sulfur.
* Rocky fissures within 1 mile of the dragon's lair form portals to the Elemental Plane of Fire, allowing creatures of elemental fire into the world to dwell nearby.

If Klauth dies, these effects fade over the course of 1d10 days.