Medium beast (Swarm), unaligned

• Armor Class 14 (natural armor)
• Hit Points 52 (8d8 + 16)
• Speed 30 ft., climb 30 ft.

STR	DEX	CON	INT	WIS	CHA
10 (+0)	14 (+2)	14 (+2)	2 (-4)	10 (+0)	3 (-4)

• Damage Resistances bludgeoning, piercing, slashing
• Condition Immunities charmed, frightened, grappled, paralyzed, petrified, prone, restrained, stunned
• Senses darkvision 60 ft., passive Perception 10
• Languages —
• Challenge 3 (700 XP)

Collapse. When the Rat King is reduced to 0 hit points, it collapses into a swarm of rats.

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

Pack Tactics. The Rat King has advantage on an attack roll against a creature if at least one of the Rat King's allies is within 5 ft. of the creature and the ally isn't incapacitated.

Swarm. The Rat King can occupy another creature's space and vice versa, and the swarm can move through any opening large enough for a Tiny rat. The Rat King can't regain hit points or gain temporary hit points.

Actions

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 16 (4d6 + 2) piercing damage. The target must make a DC 12 Constitution saving throw at the end of its next turn or take 10 (3d6) poison damage and become poisoned until the disease is cured. The disease can be cured by any magic that cures disease, but only while the target is not poisoned.

Extension of Rats. Once per turn, the Rat King can extend itself to reach out and make a bite attack against a creature within 10 feet of it. This does not provoke opportunity attacks.

Rat Wave (Recharge 5-6). The Rat King summons a horde of rats to swarm in a 15-foot cone. Each creature in that area must make a DC 12 Dexterity saving throw, taking 21 (6d6) piercing damage on a failed save, or half as much damage on a successful one. A creature that fails the saving throw by 5 or more is also grappled by the swarming rats (escape DC 12). The grappled creature takes 10 (3d6) piercing damage at the start of its turn while grappled. The Rat King cannot recharge this action while grappling a creature.

Medium beast, unaligned

Armor Class 12
Hit Points 19 (3d8 + 6)
Speed 30 ft., climb 30 ft.

STR	DEX	CON	INT	WIS	CHA
16 (+3)	14 (+2)	14 (+2)	6 (-2)	12 (+1)	7 (-2)

Saving Throws
Skills Athletics +5, Perception +3
Damage Resistances
Damage Immunities
Condition Immunities
Senses passive Perception 13
Languages --
Challenge 44928 (100 XP)

Actions

Multiattack. The ape makes two fist attacks.

Fist. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d6 + 3) bludgeoning damage.

Rock. Ranged Weapon Attack: +5 to hit, range 25/50 ft., one target. Hit: 6 (1d6 + 3) bludgeoning damage.

Huge beast, unaligned

Armor Class 12
Hit Points 157 (15d12 + 60)
Speed 40 ft., climb 40 ft.

STR	DEX	CON	INT	WIS	CHA
23 (+6)	14 (+2)	18 (+4)	7 (-2)	12 (+1)	7 (-2)

Saving Throws 
Skills Athletics +9, Perception +4
Damage Resistances 
Damage Immunities 
Condition Immunities 
Senses passive Perception 14
Languages --
Challenge 7 (2900 XP)

Actions

Multiattack. The ape makes two fist attacks.

Fist. Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 22 (3d10 + 6) bludgeoning damage.

Rock. Ranged Weapon Attack: +9 to hit, range 50/100 ft., one target. Hit: 30 (7d6 + 6) bludgeoning damage.

Medium beast, unaligned

Armor Class 10
Hit Points 13 (2d8 + 4)
Speed 30 ft., burrow 10 ft.

STR	DEX	CON	INT	WIS	CHA
13 (+1)	10 (+0)	15 (+2)	2 (-4)	12 (+1)	5 (-3)

Saving Throws
Skills
Damage Resistances
Damage Immunities
Condition Immunities
Senses darkvision 30 ft., passive Perception 11
Languages --
Challenge 44930 (50 XP)

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

Actions

Multiattack. The badger makes two attacks: one with its bite and one with its claws.

Bite. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 4 (1d6 + 1) piercing damage.

Claws. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 6 (2d4 + 1) slashing damage.

Tiny beast, unaligned

Armor Class 11
Hit Points 1 (1d4 - 1)
Speed 20 ft., swim 20 ft.

STR	DEX	CON	INT	WIS	CHA
1 (-5)	13 (+1)	8 (-1)	1 (-5)	8 (-1)	3 (-4)

Saving Throws
Skills Perception +1, Stealth +3
Damage Resistances
Damage Immunities
Condition Immunities
Senses darkvision 30 ft., passive Perception 11
Languages --
Challenge 0 (0 XP)

Amphibious. The frog can breathe air and water.

Standing Leap. The frog’s long jump is up to 10 feet and its high jump is up to 5 feet, with or without a running start. A frog has no effective attacks. It feeds on small insects and typically dwells near water, in trees, or underground. The frog’s statistics can also be used to represent a toad.

Huge beast, unaligned

Armor Class 12 (natural armor)
Hit Points 76 (8d12 + 24)
Speed 40 ft.

STR	DEX	CON	INT	WIS	CHA
22 (+6)	9 (-1)	17 (+3)	3 (-4)	11 (+0)	6 (-2)

Saving Throws
Skills
Damage Resistances
Damage Immunities
Condition Immunities
Senses passive Perception 10
Languages --
Challenge 4 (1100 XP)

Trampling Charge. If the elephant moves at least 20 feet straight toward a creature and then hits it with a gore attack on the same turn, that target must succeed on a DC 12 Strength saving throw or be knocked prone. If the target is prone, the elephant can make one stomp attack against it as a bonus action.

Actions

Gore. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 19 (3d8 + 6) piercing damage.

Stomp. Melee Weapon Attack: +8 to hit, reach 5 ft., one prone creature. Hit: 22 (3d10 + 6) bludgeoning damage.

Tiny beast, unaligned

Armor Class 14
Hit Points 5 (2d4)
Speed 30 ft., fly 60 ft., swim 30 ft.

STR	DEX	CON	INT	WIS	CHA
4 (-3)	18 (+4)	11 (+0)	2 (-4)	12 (+1)	5 (-3)

Saving Throws
Skills
Damage Resistances
Damage Immunities
Condition Immunities
Senses blindsight 10 ft., passive Perception 11
Languages --
Challenge 44934 (25 XP)

Flyby. The snake doesn’t provoke opportunity attacks when it flies out of an enemy’s reach.

Actions

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 1 piercing damage plus 7 (3d4) poison damage. A flying snake is a brightly colored, winged serpent found in remote jungles. Tribespeople and cultists sometimes domesticate flying snakes to serve as messengers that deliver scrolls wrapped in their coils.

Tiny beast, unaligned

Armor Class 11 (natural armor)
Hit Points 2 (1d4)
Speed 20 ft., swim 20 ft.

STR	DEX	CON	INT	WIS	CHA
2 (-4)	11 (+0)	10 (+0)	1 (-5)	8 (-1)	2 (-4)

Saving Throws
Skills Stealth +2
Damage Resistances
Damage Immunities
Condition Immunities
Senses blindsight 30 ft., passive Perception 9
Languages --
Challenge 0 (10 XP)

Amphibious. The crab can breathe air and water.

Actions

Claw. Melee Weapon Attack: +0 to hit, reach 5 ft., one target. Hit: 1 bludgeoning damage.

Large beast, unaligned

Armor Class 12 (natural armor)
Hit Points 19 (3d10 + 3)
Speed 20 ft., swim 30 ft.

STR	DEX	CON	INT	WIS	CHA
15 (+2)	10 (+0)	13 (+1)	2 (-4)	10 (+0)	5 (-3)

Saving Throws
Skills Stealth +2
Damage Resistances
Damage Immunities
Condition Immunities
Senses passive Perception 10
Languages --
Challenge 44928 (100 XP)

Hold Breath. The crocodile can hold its breath for 15 minutes.

Actions

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 7 (1d10 + 2) piercing damage, and the target is grappled (escape DC 12). Until this grapple ends, the target is restrained, and the crocodile can’t bite another target.

Large beast, unaligned

Armor Class 10
Hit Points 19 (3d10 + 3)
Speed 40 ft.

STR	DEX	CON	INT	WIS	CHA
18 (+4)	10 (+0)	12 (+1)	2 (-4)	11 (+0)	7 (-2)

Saving Throws
Skills
Damage Resistances
Damage Immunities
Condition Immunities
Senses passive Perception 10
Languages --
Challenge 44930 (50 XP)

Actions

Hooves. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 9 (2d4 + 4) bludgeoning damage.