Large monstrosity, lawful good

Armor Class 18 (natural armor)
Hit Points 127 (15d10 + 45)
Speed 40 ft.

STR	DEX	CON	INT	WIS	CHA
19 (+4)	18 (+4)	16 (+3)	16 (+3)	19 (+4)	18 (+4)

Saving Throws Dex +8, Con +7, Int +7, Wis +8, Cha +8
Skills 
Damage Resistances 
Damage Immunities poison
Condition Immunities charmed, poisoned
Senses darkvision 60 ft., passive Perception 14
Languages Celestial, Common
Challenge 10 (5900 XP)

Rejuvenation. If it dies, the naga returns to life in 1d6 days and regains all its hit points. Only a ““ spell can prevent this trait from functioning.

Spellcasting. The naga is an 11th-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 16, +8 to hit with spell attacks), and it needs only verbal components to cast its spells. It has the following cleric spells prepared: Cantrips (at will): ““, ““, ““ 1st level (4 slots): ““, ““, ““ 2nd level (3 slots) : ““, ““ 3rd level (3 slots): ““, ““ 4th level (3 slots): ““, ““ 5th level (2 slots): ““, ““ 6th level (1 slot): ““

Actions

Bite. Melee Weapon Attack: +8 to hit, reach 10 ft., one creature. Hit: 8 (1d8 + 4) piercing damage, and the target must make a DC 15 Constitution saving throw, taking 45 (10d8) poison damage on a failed save, or half as much damage on a successful one.

Spit Poison. Ranged Weapon Attack: +8 to hit, range 15/30 ft., one creature. Hit: The target must make a DC 15 Constitution saving throw, taking 45 (10d8) poison damage on a failed save, or half as much damage on a successful one.

Small elemental, neutral evil

Armor Class 11
Hit Points 21 (6d6)
Speed 30 ft., fly 30 ft.

STR	DEX	CON	INT	WIS	CHA
7 (-2)	13 (+1)	10 (+0)	9 (-1)	11 (+0)	12 (+1)

Saving Throws 
Skills Perception +2, Stealth +3
Damage Resistances 
Damage Immunities cold, poison
Condition Immunities poisoned
Senses darkvision 60 ft., passive Perception 12
Languages Aquan, Auran
Challenge 44928 (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 ““, 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.

Small elemental, neutral evil

Armor Class 10
Hit Points 21 (6d6)
Speed 30 ft., fly 30 ft.

STR	DEX	CON	INT	WIS	CHA
5 (-3)	11 (+0)	10 (+0)	11 (+0)	10 (+0)	12 (+1)

Saving Throws 
Skills 
Damage Resistances 
Damage Immunities fire, poison
Condition Immunities poisoned
Senses darkvision 60 ft., passive Perception 10
Languages Aquan, Ignan
Challenge 44930 (50 XP)

Death Burst. When the mephit dies, it explodes in a cloud of steam. Each creature within 5 feet of the mephit must succeed on a DC 10 Dexterity saving throw or take 4 (1d8) fire damage.

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

Actions

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

Steam Breath (Recharge 6). The mephit exhales a 15- foot cone of scalding steam. Each creature in that area must succeed on a DC 10 Dexterity saving throw, taking 4 (1d8) fire damage on a failed save, or half as much damage on a successful one.

Small elemental, neutral evil

Armor Class 12
Hit Points 17 (5d6)
Speed 30 ft., fly 30 ft.

STR	DEX	CON	INT	WIS	CHA
5 (-3)	14 (+2)	10 (+0)	9 (-1)	11 (+0)	10 (+0)

Saving Throws 
Skills Perception +2, Stealth +4
Damage Resistances 
Damage Immunities poison
Condition Immunities poisoned
Senses darkvision 60 ft., passive Perception 12
Languages Auran, Terran
Challenge 44928 (100 XP)

Death Burst. When the mephit dies, it explodes in a burst of dust. Each creature within 5 feet of it must then succeed on a DC 10 Constitution saving throw or be blinded for 1 minute. A blinded creature can repeat the saving throw on each of its turns, ending the effect on itself on a success.

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

Actions

Claws. Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 4 (1d4 + 2) slashing damage.

Blinding Breath (Recharge 6). The mephit exhales a 15- foot cone of blinding dust. Each creature in that area must succeed on a DC 10 Dexterity saving throw or be blinded 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.

Medium humanoid (human, shapechanger), chaotic evil

Armor Class 11 (11 in humanoid form, 12 in wolf or hybrid form)
Hit Points 58 (9d8 + 18)
Speed 30 ft. (40 ft. in wolf form)

STR	DEX	CON	INT	WIS	CHA
15 (+2)	13 (+1)	14 (+2)	10 (+0)	11 (+0)	10 (+0)

Saving Throws
Skills Perception +4, Stealth +3
Damage Resistances
Damage Immunities bludgeoning, piercing, and slashing from nonmagical attacks not made with silvered weapons
Condition Immunities
Senses passive Perception 14
Languages Common (can't speak in wolf form)
Challenge 3 (700 XP)

Shapechanger. The werewolf can use its action to polymorph into a wolf-humanoid hybrid or into a wolf, or back into its true form, which is humanoid. Its statistics, other than its AC, are the same in each form. Any equipment it is wearing or carrying isn’t transformed. It reverts to its true form if it dies.

Keen Hearing and Smell. The werewolf has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Actions

Multiattack (Humanoid or Hybrid Form Only). The werewolf makes two attacks: one with its bite and one with its claws or spear.

Bite (Wolf or Hybrid Form Only). Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 6 (1d8 + 2) piercing damage. If the target is a humanoid, it must succeed on a DC 12 Constitution saving throw or be cursed with werewolf lycanthropy.

Claws (Hybrid Form Only). Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 7 (2d4 + 2) slashing damage.

Spear (Humanoid Form Only). Melee or Ranged Weapon Attack: +4 to hit, reach 5 ft. or range 20/60 ft., one creature. Hit: 5 (1d6 + 2) piercing damage, or 6 (1d8 + 2) piercing damage if used with two hands to make a melee attack.

Medium humanoid (human, shapechanger), neutral

Armor Class 12
Hit Points 120 (16d8 + 48)
Speed 30 ft. (40 ft. in tiger form)

STR	DEX	CON	INT	WIS	CHA
17 (+3)	15 (+2)	16 (+3)	10 (+0)	13 (+1)	11 (+0)

Saving Throws 
Skills Perception +5, Stealth +4
Damage Resistances 
Damage Immunities bludgeoning, piercing, and slashing from nonmagical attacks not made with silvered weapons
Condition Immunities 
Senses darkvision 60 ft., passive Perception 15
Languages Common (can't speak in tiger form)
Challenge 4 (1100 XP)

Shapechanger. The weretiger can use its action to polymorph into a tiger-humanoid hybrid or into a tiger, or back into its true form, which is humanoid. Its statistics, other than its size, are the same in each form. Any equipment it is wearing or carrying isn’t transformed. It reverts to its true form if it dies.

Keen Hearing and Smell. The weretiger has advantage on Wisdom (Perception) checks that rely on hearing or smell.

Pounce (Tiger or Hybrid Form Only). If the weretiger moves at least 15 feet straight toward a creature and then hits it with a claw attack on the same turn, that target must succeed on a DC 14 Strength saving throw or be knocked prone. If the target is prone, the weretiger can make one bite attack against it as a bonus action.

Actions

Multiattack (Humanoid or Hybrid Form Only). In humanoid form, the weretiger makes two scimitar attacks or two longbow attacks. In hybrid form, it can attack like a humanoid or make two claw attacks.

Bite (Tiger or Hybrid Form Only). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 8 (1d10 + 3) piercing damage. If the target is a humanoid, it must succeed on a DC 13 Constitution saving throw or be cursed with weretiger lycanthropy.

Claw (Tiger or Hybrid Form Only). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 3) slashing damage.

Scimitar (Humanoid or Hybrid Form Only). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) slashing damage.

Longbow (Humanoid or Hybrid Form Only). Ranged Weapon Attack: +4 to hit, range 150/600 ft., one target. Hit: 6 (1d8 + 2) piercing damage.

Medium humanoid (human, shapechanger), lawful evil

Armor Class 12
Hit Points 33 (6d8 + 6)
Speed 30 ft.

STR	DEX	CON	INT	WIS	CHA
10 (+0)	15 (+2)	12 (+1)	11 (+0)	10 (+0)	8 (-1)

Saving Throws 
Skills Perception +2, Stealth +4
Damage Resistances 
Damage Immunities bludgeoning, piercing, and slashing from nonmagical attacks not made with silvered weapons
Condition Immunities 
Senses darkvision 60 ft. (rat form only), passive Perception 12
Languages Common (can't speak in rat form)
Challenge 2 (450 XP)

Shapechanger. The wererat can use its action to polymorph into a rat-humanoid hybrid or into a giant rat, or back into its true form, which is humanoid. Its statistics, other than its size, are the same in each form. Any equipment it is wearing or carrying isn’t transformed. It reverts to its true form if it dies.

Keen Smell. The wererat has advantage on Wisdom (Perception) checks that rely on smell.

Actions

Multiattack (Humanoid or Hybrid Form Only). The wererat makes two attacks, only one of which can be a bite.

Bite (Rat or Hybrid Form Only). Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 4 (1d4 + 2) piercing damage. If the target is a humanoid, it must succeed on a DC 11 Constitution saving throw or be cursed with wererat lycanthropy.

Shortsword (Humanoid or Hybrid Form Only). Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) piercing damage.

Hand Crossbow (Humanoid or Hybrid Form Only). Ranged Weapon Attack: +4 to hit, range 30/120 ft., one target. Hit: 5 (1d6 + 2) piercing damage.

Medium humanoid (human, shapechanger), neutral evil

Armor Class 10 (10 in humanoid form, 11 in boar or hybrid form)
Hit Points 78 (12d8 + 24)
Speed 30 ft. (40 ft. in boar form)

STR	DEX	CON	INT	WIS	CHA
17 (+3)	10 (+0)	15 (+2)	10 (+0)	11 (+0)	8 (-1)

Saving Throws 
Skills Perception +2
Damage Resistances 
Damage Immunities bludgeoning, piercing, and slashing from nonmagical attacks not made with silvered weapons
Condition Immunities 
Senses passive Perception 12
Languages Common (can't speak in boar form)
Challenge 4 (1100 XP)

Shapechanger. The wereboar can use its action to polymorph into a boar-humanoid hybrid or into a boar, or back into its true form, which is humanoid. Its statistics, other than its AC, are the same in each form. Any equipment it is wearing or carrying isn’t transformed. It reverts to its true form if it dies.

Charge (Boar or Hybrid Form Only). If the wereboar moves at least 15 feet straight toward a target and then hits it with its tusks on the same turn, the target takes an extra 7 (2d6) slashing damage. If the target is a creature, it must succeed on a DC 13 Strength saving throw or be knocked prone.

Relentless (Recharges after a Short or Long Rest). If the wereboar takes 14 damage or less that would reduce it to 0 hit points, it is reduced to 1 hit point instead.

Actions

Multiattack (Humanoid or Hybrid Form Only). The wereboar makes two attacks, only one of which can be with its tusks.

Maul (Humanoid or Hybrid Form Only). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) bludgeoning damage.

Tusks (Boar or Hybrid Form Only). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) slashing damage. If the target is a humanoid, it must succeed on a DC 12 Constitution saving throw or be cursed with wereboar lycanthropy.

Medium humanoid (human, shapechanger), neutral good

Armor Class 10 (10 in humanoid form, 11 in bear and hybrid form)
Hit Points 135 (18d8 + 54)
Speed 30 ft. (40 ft., climb 30 ft. in bear or hybrid form)

STR	DEX	CON	INT	WIS	CHA
19 (+4)	10 (+0)	17 (+3)	11 (+0)	12 (+1)	12 (+1)

Saving Throws 
Skills Perception +7
Damage Resistances 
Damage Immunities bludgeoning, piercing, and slashing from nonmagical attacks not made with silvered weapons
Condition Immunities 
Senses passive Perception 17
Languages Common (can't speak in bear form)
Challenge 5 (1800 XP)

Shapechanger. The werebear can use its action to polymorph into a Large bear-humanoid hybrid or into a Large bear, or back into its true form, which is humanoid. Its statistics, other than its size and AC, are the same in each form. Any equipment it is wearing or carrying isn’t transformed. It reverts to its true form if it dies.

Keen Smell. The werebear has advantage on Wisdom (Perception) checks that rely on smell.

Actions

Multiattack. In bear form, the werebear makes two claw attacks. In humanoid form, it makes two greataxe attacks. In hybrid form, it can attack like a bear or a humanoid.

Bite (Bear or Hybrid Form Only). Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 15 (2d10 + 4) piercing damage. If the target is a humanoid, it must succeed on a DC 14 Constitution saving throw or be cursed with werebear lycanthropy.

Claw (Bear or Hybrid Form Only). Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage.

Greataxe (Humanoid or Hybrid Form Only). Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 10 (1d12 + 4) slashing damage.

Medium fey, chaotic evil

Armor Class 14 (natural armor)
Hit Points 52 (7d8 + 21)
Speed 30 ft., swim 40 ft.

STR	DEX	CON	INT	WIS	CHA
16 (+3)	13 (+1)	16 (+3)	12 (+1)	12 (+1)	13 (+1)

Saving Throws 
Skills 
Damage Resistances 
Damage Immunities 
Condition Immunities 
Senses darkvision 60 ft., passive Perception 11
Languages Aquan, Common, Giant
Challenge 2 (450 XP)

Amphibious. The hag can breathe air and water.

Horrific Appearance. Any humanoid that starts its turn within 30 feet of the hag and can see the hag’s true form must make a DC 11 Wisdom saving throw. On a failed save, the creature is frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, with disadvantage if the hag is within line of sight, 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 the hag’s Horrific Appearance for the next 24 hours. Unless the target is surprised or the revelation of the hag’s true form is sudden, the target can avert its eyes and avoid making the initial saving throw. Until the start of its next turn, a creature that averts its eyes has disadvantage on attack rolls against the hag.

Actions

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

Death Glare. The hag targets one frightened creature she can see within 30 feet of her. If the target can see the hag, it must succeed on a DC 11 Wisdom saving throw against this magic or drop to 0 hit points.

Illusory Appearance. The hag covers herself and anything she is wearing or carrying with a magical illusion that makes her look like an ugly creature of her general size and humanoid shape. The effect ends if the hag takes a bonus action to end it or if she dies. The changes wrought by this effect fail to hold up to physical inspection. For example, the hag could appear to have no claws, but someone touching her hand might feel the claws. Otherwise, a creature must take an action to visually inspect the illusion and succeed on a DC 16 Intelligence (Investigation) check to discern that the hag is disguised.