Ice Devil

Large fiend (devil), lawful evil

Armor Class 18 (natural armor)

Hit Points 180 (19d10 + 76)

Speed 40 ft.

Saving Throws Dex +7, Con +9, Wis +7, Cha +9

Damage Resistances bludgeoning, piercing, and slashing from nonmagical attacks that aren’t silvered

Damage Immunities cold, fire, poison

Condition Immunities poisoned

Senses blindsight 60 ft., darkvision 120 ft., passive Perception 12

Languages Infernal, telepathy 120 ft.

Challenge 14 (11,500 XP)

Devil’s Sight. Magical darkness doesn’t impede the devil’s darkvision.

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

Actions

Multiattack. The devil makes three attacks: one with its bite, one with its claws, and one with its tail.

Bite. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) piercing damage plus 10 (3d6) cold damage.

Claws. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 10 (2d4 + 5) slashing damage plus 10 (3d6) cold damage.

Tail. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 12 (2d6 + 5) bludgeoning damage plus 10 (3d6) cold damage.

Wall of Ice (Recharge 6). The devil magically forms an opaque wall of ice on a solid surface it can see within 60 feet of it. The wall is 1 foot thick and up to 30 feet long and 10 feet high, or it’s a hemispherical dome up to 20 feet in diameter.

When the wall appears, each creature in its space is pushed out of it by the shortest route. The creature chooses which side of the wall to end up on, unless the creature is incapacitated. The creature then makes a DC 17 Dexterity saving throw, taking 35 (10d6) cold damage on a failed save, or half as much damage on a successful one.

The wall lasts for 1 minute or until the devil is incapacitated or dies. The wall can be damaged and breached; each 10-foot section has AC 5, 30 hit points, vulnerability to fire damage, and immunity to acid, cold, necrotic, poison, and psychic damage. If a section is destroyed, it leaves behind a sheet of frigid air in the space the wall occupied. Whenever a creature finishes moving through the frigid air on a turn, willingly or otherwise, the creature must make a DC 17 Constitution saving throw, taking 17 (5d6) cold damage on a failed save, or half as much damage on a successful one. The frigid air dissipates when the rest of the wall vanishes.

Ice Mephit

Small elemental, neutral evil

Armor Class 11

Hit Points 21 (6d6)

Speed 30 ft., fly 30 ft.

Skills Perception +2, Stealth +3

Damage Vulnerabilities bludgeoning, fire

Damage Immunities cold, poison

Condition Immunities poisoned

Senses darkvision 60 ft., passive Perception 12

Languages Aquan, Auran

Challenge 1/2 (100 XP)

Death Burst. When the mephit dies, it explodes in a burst of jagged ice. Each creature within 5 feet of it must make a DC 10 Dexterity saving throw, taking 4 (1d8) slashing damage on a failed save, or half as much damage on a successful one.

False Appearance. While the mephit remains motionless, it is indistinguishable from an ordinary shard of ice.

Innate Spellcasting (1/Day). The mephit can innately cast fog cloud, requiring no material components. Its innate spellcasting ability is Charisma.

Actions

Claws. Melee Weapon Attack: +3 to hit, reach 5 ft., one creature. Hit: 3 (1d4 + 1) slashing damage plus 2 (1d4) cold damage.

Frost Breath (Recharge 6). The mephit exhales a 15-foot cone of cold air. Each creature in that area must succeed on a DC 10 Dexterity saving throw, taking 5 (2d4) cold damage on a failed save, or half as much damage on a successful one.

Imp

Tiny fiend (devil, shapechanger), lawful evil

Armor Class 13

Hit Points 10 (3d4 + 3)

Speed 20 ft., fly 40 ft.

Skills Deception +4, Insight +3, Persuasion +4, Stealth +5

Damage Resistances cold; bludgeoning, piercing, and slashing from nonmagical attacks that aren’t silvered

Damage Immunities fire, poison

Condition Immunities poisoned

Senses darkvision 120 ft., passive Perception 11

Languages Infernal, Common

Challenge 1 (200 XP)

Shapechanger. The imp can use its action to polymorph into a beast form that resembles a rat (speed 20 ft.), a raven (20 ft., fly 60 ft.), or a spider (20 ft., climb 20 ft.), or back into its true form. Its statistics are the same in each form, except for the speed changes noted. Any equipment it is wearing or carrying isn’t transformed. It reverts to its true form if it dies.

Devil’s Sight. Magical darkness doesn’t impede the imp’s darkvision.

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

Actions

Sting (Bite in Beast Form). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d4 + 3) piercing damage, and the target must make on a DC 11 Constitution saving throw, taking 10 (3d6) poison damage on a failed save, or half as much damage on a successful one.

Invisibility. The imp magically turns invisible until it attacks or until its concentration ends (as if concentrating on a spell). Any equipment the imp wears or carries is invisible with it.

Invisible Stalker

Medium elemental, neutral

Armor Class 14

Hit Points 104 (16d8 + 32)

Speed 50 ft., fly 50 ft. (hover)

Skills Perception +8, Stealth +10

Damage Resistances bludgeoning, piercing, and slashing from nonmagical attacks

Damage Immunities poison

Condition Immunities exhaustion, grappled, paralyzed, petrified, poisoned, prone, restrained, unconscious

Senses darkvision 60 ft., passive Perception 18

Languages Auran, understands Common but doesn’t speak it

Challenge 6 (2,300 XP)

Invisibility. The stalker is invisible.

Faultless Tracker. The stalker is given a quarry by its summoner. The stalker knows the direction and distance to its quarry as long as the two of them are on the same plane of existence. The stalker also knows the location of its summoner.

Actions

Multiattack. The stalker makes two slam attacks.

Slam. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) bludgeoning damage.

Iron Golem

Large construct, unaligned

Armor Class 20 (natural armor)

Hit Points 210 (20d10 + 100)

Speed 30 ft.

Damage Immunities fire, poison, psychic; bludgeoning, piercing, and slashing from nonmagical attacks that aren’t adamantine

Condition Immunities charmed, exhaustion, frightened, paralyzed, petrified, poisoned

Senses darkvision 120 ft., passive Perception 10

Languages understands the languages of its creator but can’t speak

Challenge 16 (15,000 XP)

Fire Absorption. Whenever the golem is subjected to fire damage, it takes no damage and instead regains a number of hit points equal to the fire damage dealt.

Immutable Form. The golem is immune to any spell or effect that would alter its form.

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

Magic Weapons. The golem’s weapon attacks are magical.

Actions

Multiattack. The golem makes two melee attacks.

Slam. Melee Weapon Attack: +13 to hit, reach 5 ft., one target. Hit: 20 (3d8 + 7) bludgeoning damage.

Sword. Melee Weapon Attack: +13 to hit, reach 10 ft., one target. Hit: 23 (3d10 + 7) slashing damage.

Poison Breath (Recharge 6). The golem exhales poisonous gas in a 15-foot cone. Each creature in that area must make a DC 19 Constitution saving throw, taking 45 (10d8) poison damage on a failed save, or half as much damage on a successful one.