Young Green Dragon

Large dragon, lawful evil

Armor Class 18 (natural armor)
Hit Points 136 (16d10 + 48)
Speed 40 ft., fly 80 ft., swim 40 ft.

STR	DEX	CON	INT	WIS	CHA
19 (+4)	12 (+1)	17 (+3)	16 (+3)	13 (+1)	15 (+2)

Saving Throws Dex +4, Con +6, Wis +4, Cha +5
Skills Deception +5, Perception +7, Stealth +4
Damage Immunities poison
Condition Immunities poisoned
Senses blindsight 30 ft., darkvision 120 ft., passive Perception 17
Languages Common, Draconic
Challenge 8 (3,900 XP)

Amphibious. The dragon can breathe air and water.

Actions

Multiattack. The dragon makes three attacks: one with its bite and two with its claws.
Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 15 (2d10 + 4) piercing damage plus 7 (2d6) poison damage.
Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage.
Poison Breath (Recharge 5–6). The dragon exhales poisonous gas in a 30‐foot cone. Each creature in that area must make a DC 14 Constitution saving throw, taking 42 (12d6) poison damage on a failed save, or half as much damage on a successful one.

Young Bronze Dragon

Large dragon, lawful good

Armor Class 18 (natural armor)
Hit Points 142 (15d10 + 60)
Speed 40 ft., fly 80 ft., swim 40 ft.

STR	DEX	CON	INT	WIS	CHA
21 (+5)	10 (+0)	19 (+4)	14 (+2)	13 (+1)	17 (+3)

Saving Throws Dex +3, Con +7, Wis +4, Cha +6
Skills Insight +4, Perception +7, Stealth +3
Damage Immunities lightning
Senses blindsight 30 ft., darkvision 120 ft., passive Perception 17
Languages Common, Draconic
Challenge 8 (3,900 XP)

Amphibious. The dragon can breathe air and water.

Actions

Multiattack. The dragon makes three attacks: one with its bite and two with its claws.
Bite. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 16 (2d10 + 5) piercing damage.
Claw. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) slashing damage.
Breath Weapons (Recharge 5–6). The dragon uses one of the following breath weapons.
Lightning Breath. The dragon exhales lightning in a 60- foot line that is 5 feet wide. Each creature in that line must make a DC 15 Dexterity saving throw, taking 55 (10d10) lightning damage on a failed save, or half as much damage on a successful one.
Repulsion Breath. The dragon exhales repulsion energy in a 30-foot cone. Each creature in that area must succeed on a DC 15 Strength saving throw. On a failed save, the creature is pushed 40 feet away from the dragon.

Tyrannosaurus Rex

Huge beast, unaligned

Armor Class 13 (natural armor)
Hit Points 136 (13d12 + 52)
Speed 50 ft.

STR	DEX	CON	INT	WIS	CHA
25 (+7)	10 (+0)	19 (+4)	2 (−4)	12 (+1)	9 (−1)

Skills Perception +4
Senses passive Perception 14
Languages —
Challenge 8 (3,900 XP)

Actions

Multiattack. The tyrannosaurus makes two attacks: one with its bite and one with its tail. It can’t make both attacks against the same target.
Bite. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 33 (4d12 + 7) piercing damage. If the target is a Medium or smaller creature, it is grappled (escape DC 17). Until this grapple ends, the target is restrained, and the tyrannosaurus can’t bite another target.
Tail. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 20 (3d8 + 7) bludgeoning damage.

Spirit Naga

Large monstrosity, chaotic evil

Armor Class 15 (natural armor)
Hit Points 75 (10d10 + 20)
Speed 40 ft.

STR	DEX	CON	INT	WIS	CHA
18 (+4)	17 (+3)	14 (+2)	16 (+3)	15 (+2)	16 (+3)

Saving Throws Dex +6, Con +5, Wis +5, Cha +6
Damage Immunities poison
Condition Immunities charmed, poisoned
Senses darkvision 60 ft., passive Perception 12
Languages Abyssal, Common
Challenge 8 (3,900 XP)

Rejuvenation. If it dies, the naga returns to life in 1d6 days and regains all its hit points. Only a wish spell can prevent this trait from functioning.
Spellcasting. The naga is a 10th-level spellcaster. Its spellcasting ability is Intelligence (spell save DC 14, +6 to hit with spell attacks), and it needs only verbal components to cast its spells. It has the following wizard spells prepared:
Cantrips (at will): mage hand, minor illusion, ray of frost
1st level (4 slots): charm person, detect magic, sleep
2nd level (3 slots): detect thoughts, hold person
3rd level (3 slots): lightning bolt, water breathing
4th level (3 slots): blight, dimension door
5th level (2 slots): dominate person

Actions

Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one creature. Hit: 7 (1d6 + 4) piercing damage, and the target must make a DC 13 Constitution saving throw, taking 31 (7d8) poison damage on a failed save, or half as much damage on a successful one.

Hydra

Huge monstrosity, unaligned

Armor Class 15 (natural armor)
Hit Points 172 (15d12 + 75)
Speed 30 ft., swim 30 ft.

STR	DEX	CON	INT	WIS	CHA
20 (+5)	12 (+1)	20 (+5)	2 (−4)	10 (+0)	7 (−2)

Skills Perception +6
Senses darkvision 60 ft., passive Perception 16
Languages —
Challenge 8 (3,900 XP)

Hold Breath. The hydra can hold its breath for 1 hour.
Multiple Heads. The hydra has five heads. While it has more than one head, the hydra has advantage on saving throws against being blinded, charmed, deafened, frightened, stunned, and knocked unconscious.
Whenever the hydra takes 25 or more damage in a single turn, one of its heads dies. If all its heads die, the hydra dies.
At the end of its turn, it grows two heads for each of its heads that died since its last turn, unless it has taken fire damage since its last turn. The hydra regains 10 hit points for each head regrown in this way.
Reactive Heads. For each head the hydra has beyond one, it gets an extra reaction that can be used only for opportunity attacks.
Wakeful. While the hydra sleeps, at least one of its heads is awake.

Actions

Multiattack. The hydra makes as many bite attacks as it has heads.
Bite. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 10 (1d10 + 5) piercing damage.

Hezrou

Large fiend (demon), chaotic evil Armor Class 16 (natural armor)
Hit Points 136 (13d10 + 65)
Speed 30 ft.

STR	DEX	CON	INT	WIS	CHA
19 (+4)	17 (+3)	20 (+5)	5 (−3)	12 (+1)	13 (+1)

Saving Throws Str +7, Con +8, Wis +4
Damage Resistances cold, fire, lightning; bludgeoning, piercing, and slashing from nonmagical attacks
Damage Immunities poison
Condition Immunities poisoned
Senses darkvision 120 ft., passive Perception 11
Languages Abyssal, telepathy 120 ft.
Challenge 8 (3,900 XP)

Magic Resistance. The hezrou has advantage on saving throws against spells and other magical effects.
Stench. Any creature that starts its turn within 10 feet of the hezrou must succeed on a DC 14 Constitution saving throw or be poisoned until the start of its next turn. On a successful saving throw, the creature is immune to the hezrou’s stench for 24 hours.

Actions

Multiattack. The hezrou makes three attacks: one with its bite and two with its claws.
Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 15 (2d10 + 4) piercing damage.
Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage.

Frost Giant

Huge giant, neutral evil

Armor Class 15 (patchwork armor)
Hit Points 138 (12d12 + 60)
Speed 40 ft.

STR	DEX	CON	INT	WIS	CHA
23 (+6)	9 (−1)	21 (+5)	9 (−1)	10 (+0)	12 (+1)

Saving Throws Con +8, Wis +3, Cha +4
Skills Athletics +9, Perception +3
Damage Immunities cold
Senses passive Perception 13
Languages Giant
Challenge 8 (3,900 XP)

Actions

Multiattack. The giant makes two greataxe attacks.
Greataxe. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 25 (3d12 + 6) slashing damage.
Rock. Ranged Weapon Attack: +9 to hit, range 60/240 ft., one target. Hit: 28 (4d10 + 6) bludgeoning damage.

Cloaker

Large aberration, chaotic neutral

Armor Class 14 (natural armor)
Hit Points 78 (12d10 + 12)
Speed 10 ft., fly 40 ft.

STR	DEX	CON	INT	WIS	CHA
17 (+3)	15 (+2)	12 (+1)	13 (+1)	12 (+1)	14 (+2)

Skills Stealth +5
Senses darkvision 60 ft., passive Perception 11
Languages Deep Speech, Undercommon
Challenge 8 (3,900 XP)

Damage Transfer. While attached to a creature, the cloaker takes only half the damage dealt to it (rounded down), and that creature takes the other half.
False Appearance. While the cloaker remains motionless without its underside exposed, it is indistinguishable from a dark leather cloak.
Light Sensitivity. While in bright light, the cloaker has disadvantage on attack rolls and Wisdom (Perception) checks that rely on sight.

Actions

Multiattack. The cloaker makes two attacks: one with its bite and one with its tail.
Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one creature. Hit: 10 (2d6 + 3) piercing damage, and if the target is Large or smaller, the cloaker attaches to it. If the cloaker has advantage against the target, the cloaker attaches to the target’s head, and the target is blinded and unable to breathe while the cloaker is attached. While attached, the cloaker can make this attack only against the target and has advantage on the attack roll. The cloaker can detach itself by spending 5 feet of its movement. A creature, including the target, can take its action to detach the cloaker by succeeding on a DC 16 Strength check.
Tail. Melee Weapon Attack: +6 to hit, reach 10 ft., one creature. Hit: 7 (1d8 + 3) slashing damage.
Moan. Each creature within 60 feet of the cloaker that can hear its moan and that isn’t an aberration must succeed on a DC 13 Wisdom saving throw or become frightened until the end of the cloaker’s next turn. If a creature’s saving throw is successful, the creature is immune to the cloaker’s moan for the next 24 hours.
Phantasms (Recharges after a Short or Long Rest). The cloaker magically creates three illusory duplicates of itself if it isn’t in bright light. The duplicates move with it and mimic its actions, shifting position so as to make it impossible to track which cloaker is the real one. If the cloaker is ever in an area of bright light, the duplicates disappear.
Whenever any creature targets the cloaker with an attack or a harmful spell while a duplicate remains, that creature rolls randomly to determine whether it targets the cloaker or one of the duplicates. A creature is unaffected by this magical effect if it can’t see or if it relies on senses other than sight.
A duplicate has the cloaker’s AC and uses its saving throws. If an attack hits a duplicate, or if a duplicate fails a saving throw against an effect that deals damage, the duplicate disappears.

Chain Devil

Medium fiend (devil), lawful evil

Armor Class 16 (natural armor)
Hit Points 85 (10d8 + 40)
Speed 30 ft.

STR	DEX	CON	INT	WIS	CHA
18 (+4)	15 (+2)	18 (+4)	11 (+0)	12 (+1)	14 (+2)

Saving Throws Con +7, Wis +4, Cha +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, telepathy 120 ft.
Challenge 8 (3,900 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 two attacks with its chains.
Chain. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 11 (2d6 + 4) slashing damage. The target is grappled (escape DC 14) if the devil isn’t already grappling a creature. Until this grapple ends, the target is restrained and takes 7 (2d6) piercing damage at the start of each of its turns.
Animate Chains (Recharges after a Short or Long Rest). Up to four chains the devil can see within 60 feet of it magically sprout razor-­edged barbs and animate under the devil’s control, provided that the chains aren’t being worn or carried.
Each animated chain is an object with AC 20, 20 hit points, resistance to piercing damage, and immunity to psychic and thunder damage. When the devil uses multiattack on its turn, it can use each animated chain to make one additional chain attack. An animated chain can grapple one creature of its own but can’t make attacks while grappling. An animated chain reverts to its inanimate state if reduced to 0 hit points or if the devil is incapacitated or dies.

Reactions

Unnerving Mask. When a creature the devil can see starts its turn within 30 feet of the devil, the devil can create the illusion that it looks like one of the creature’s departed loved ones or bitter enemies. If the creature can see the devil, it must succeed on a DC 14 Wisdom saving throw or be frightened until the end of its turn.

Assassin

Medium humanoid (any race), any non-good alignment

Armor Class 15 (studded leather)
Hit Points 78 (12d8 + 24)
Speed 30 ft.

STR	DEX	CON	INT	WIS	CHA
11 (+0)	16 (+3)	14 (+2)	13 (+1)	11 (+0)	10 (+0)

Saving Throws Dex +6, Int +4
Skills Acrobatics +6, Deception +3, Perception +3, Stealth +9
Damage Resistances poison
Senses passive Perception 13
Languages Thieves’ cant plus any two languages
Challenge 8 (3,900 XP)

Assassinate. During its first turn, the assassin has advantage on attack rolls against any creature that hasn’t taken a turn. Any hit the assassin scores against a surprised creature is a critical hit.
Evasion. If the assassin is subjected to an effect that allows it to make a Dexterity saving throw to take only half damage, the assassin instead takes no damage if it succeeds on the saving throw, and only half damage if it fails.
Sneak Attack. Once per turn, the assassin deals an extra 14 (4d6) damage when it hits a target with a weapon attack and has advantage on the attack roll, or when the target is within 5 feet of an ally of the assassin that isn’t incapacitated and the assassin doesn’t have disadvantage on the attack roll.

Actions

Multiattack. The assassin makes two shortsword attacks.
Shortsword. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) piercing damage, and the target must make a DC 15 Constitution saving throw, taking 24 (7d6) poison damage on a failed save, or half as much damage on a successful one.
Light Crossbow. Ranged Weapon Attack: +6 to hit, range 80/320 ft., one target. Hit: 7 (1d8 + 3) piercing damage, and the target must make a DC 15 Constitution saving throw, taking 24 (7d6) poison damage on a failed save, or half as much damage on a successful one.

Description

Trained in the use of poison, assassins are remorseless killers who work for nobles, guildmasters, sovereigns, and anyone else who can afford them.