Large Fiend (Devil), Chaotic Evil
Armor Class 19 Natural Armor
Hit Points 999 (999d10 + 999)
Speed 30 ft., Fly 60 ft.
STR
27 (+8)
DEX
16 (+3)
CON
25 (+7)
INT
21 (+5)
WIS
19 (+4)
CHA
25 (+7)
Saving Throws STR +15, DEX +10, CON +14, INT +12, WIS +11, CHA +14
Skills Arcana +19, History +12, Insight +9, Intimidation +14, Perception +11
Damage Resistances Cold, Lightning, Necrotic; Bludgeoning, Piercing, and Slashing from Nonmagical Attacks that aren't Silvered
Damage Immunities Fire, Poison
Gear Great Mace
Senses Darkvision 120 feet, Truesight 120 feet , Passive Perception 20
Languages All, Telepathy 120 feet
Challenge 21 (33,000 XP)
Proficiency Bonus +7
Traits

Infernal Despair. Each creature within 30 feet of Annakahn that isn't a devil has disadvantage on all saving throws.

Legendary Resistance. If Annakahn fails a saving throw, he can choose to succeed instead.

Magic Resistance. Annakahn has advantage on saving throws against spells and other magical effects. 

Regeneration. Annakahn regains 20 hit points at the start of his turn. If he takes radiant damage, this trait doesn’t function at the start of his next turn. Annakahn dies only if he starts his turn with 0 hit points and doesn’t regenerate.

Turn Resistance. Annakahn has advantage on saving throws against any effects that turns undead. 

Spellcasting. Annakahn is an 18-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 20, +12 to hit with spell attacks). 
Cantrips (at will): Alter self, Hold Monster, Mage Hand, Lightning Bolt, Ray of Frost, Prestidigitation, Wall of Fire
1st level (99 slots): Detect Magic, Magic Missile, Sheild, Thunderwave                                  2nd level (99 slots): Acid Arrow, Detect Thoughts, Invisibility, Mirror Image                          3rd level (99 slots): Animate Dead, Counterspell, Dispel Magic, Fireball                                  4th level (99 slots): Blight, Dimension Door                                                                                  5th level (99 slots): Cloudkill, Scrying                                                                                            6th level (99 slots): Disintegrate, Globe of Invulnerability                                                          7th level (99 slots): Finger of Death, Plane Shift                                                                          8th level (99 slots): Dominate Monster, Power Word Stun                                                        9th level (99 slots): Power Word Kill

Actions

Multiattack. Annakahn makes takes five actions per turn. 

Paralyzing Touch. Melee Spell Attack: +12 to hit, reach 5 feet, one creature. Hit (3d6) cold damage. The target must make a DC 18 Constitution Saving Throw or be paralyzed for 10 turns (1 minute). The target can repeat the saving throw at the end of each of its turn, ending the effect on a success. 

Claw. Melee Weapon Attack: +15 to hit, reach 10ft, one creature. Hit (2d8+8) cold damage. 

Mace. Melee Weapon Attack: +15 to hit, reach 10ft., one creature. Hit (3d6 + 8) force damage. 

Teleport. Annakahn magically teleports, along with any gear he is wearing and carrying, up to 120 feet to an unoccupied space he can see. 

Reactions

Fearful Voice (Recharge 5 Turn). In response to taking damage, Annakahn utters a dreadful word of power. Each creature within 30 feet of Annakahn that isn't a devil must succeed a DC 22 Wisdom Saving Throw or become frightened of him for 10 turns (1 minute). A creature can repeat the saving throw at the end of each of its turns, ending the effects on itself on a success. A creature that saves against this effect is immurne to his voice for the next 24 hours.    

Legendary Actions

Annakahn can take only take one legendary action per turn either during his turn or the end of any players turn. 

Disrupt Life (Cost 3 Actions). Each non-dead creature within 20 feet of Annakahn must make a DC 18 Constitution Saving Throw against this magic, taking (6d6) necrotic damage on a failed save and only half as much on a successful one.

Frightening Gaze (Cost 2 Actions). Annakahn fixes his gaze on one creature in can see within 10 feet of it. The target must succeed on a DC 18 Wisdom Saving throw against this magic or become frightened for 10 turns (1 minute).  The frightened target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a target’s saving throw is successful or the effect ends for it, the target is immune to Annakahn's gaze for the next 24 hours.

Lighting Storm (Cost 2 Actions).  Annakahn releases lightning in a 30-foot radius, blocked only by total cover. All other creatures in that area must each make a DC 22 Dexterity saving throw, taking 18 (4d8) lightning damage on a failed save, or half as much damage on a successful one.

Mythic Actions

Mythic Action Name. Enter the description for how mythic actions work for your monster here.

Mythic Action Name (Costs # Actions). Enter the description for your mythic action.

Lair and Lair Actions

Enter a description of your monster's lair here.

Lair Actions

On initiative count 20 (losing initiative ties), Annakahn takes a lair action to cause one of the following effects: Annakahn can’t use the same effect two rounds in a row:

 

  • Annakahn targets one creature it can see within 30 feet of it. A crackling cord of negative energy tethers Annakahn to the target. Whenever Annakahn takes damage, the target must make a DC 18 Constitution saving throw. On a failed save, Annakahn takes half the damage (rounded down), and the target takes the remaining damage. This tether lasts until initiative count 20 on the next round or until they are out of Annakahn's lair. 
  • Annakahn calls forth the spirits of creatures that died in its lair. These apparitions materialize and attack one creature that he can see within 60 feet of it. The target must succeed on a DC 18 Constitution saving throw, taking 52 (15d6) necrotic damage on a failed save, or half as much damage on a success. The apparitions then disappear.

 

Habitat: Planar (Nine Hells)

BraydenWalker67

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