Ancient White Dragon

Gargantuan dragon, chaotic evil

Armor Class 20 (natural armor)
Hit Points 333 (18d20 + 144)
Speed 40 ft., burrow 40 ft., fly 80 ft., swim 40 ft.

STR	DEX	CON	INT	WIS	CHA
26 (+8)	10 (+0)	26 (+8)	10 (+0)	13 (+1)	14 (+2)

Saving Throws Dex +6, Con +14, Wis +7, Cha +8
Skills Perception +13, Stealth +6
Damage Immunities cold
Senses blindsight 60 ft., darkvision 120 ft., passive Perception 23
Languages Common, Draconic
Challenge 20 (25,000 XP)

Ice Walk. The dragon can move across and climb icy surfaces without needing to make an ability check. Additionally, difficult terrain composed of ice or snow doesn’t cost it extra moment.
Legendary Resistance (3/Day). If the dragon fails a saving throw, it can choose to succeed instead.

Actions

Multiattack. The dragon can use its Frightful Presence. It then makes three attacks: one with its bite and two with its claws.
Bite. Melee Weapon Attack: +14 to hit, reach 15 ft., one target. Hit: 19 (2d10 + 8) piercing damage plus 9 (2d8) cold damage.
Claw. Melee Weapon Attack: +14 to hit, reach 10 ft., one target. Hit: 15 (2d6 + 8) slashing damage.
Tail. Melee Weapon Attack: +14 to hit, reach 20 ft., one target. Hit: 17 (2d8 + 8) bludgeoning damage.
Frightful Presence. Each creature of the dragon’s choice that is within 120 feet of the dragon and aware of it must succeed on a DC 16 Wisdom saving throw or become frightened 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. If a creature’s saving throw is successful or the effect ends for it, the creature is immune to the dragon’s Frightful Presence for the next 24 hours.
Cold Breath (Recharge 5–6). The dragon exhales an icy blast in a 90-foot cone. Each creature in that area must make a DC 22 Constitution saving throw, taking 72 (16d8) cold damage on a failed save, or half as much damage on a successful one.

Legendary Actions

The dragon can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature’s turn. The dragon regains spent legendary actions at the start of its turn.
Detect. The dragon makes a Wisdom (Perception) check.
Tail Attack. The dragon makes a tail attack.
Wing Attack (Costs 2 Actions). The dragon beats its wings. Each creature within 15 feet of the dragon must succeed on a DC 22 Dexterity saving throw or take 15 (2d6 + 8) bludgeoning damage and be knocked prone. The dragon can then fly up to half its flying speed.

Winter Wolf

Large monstrosity, neutral evil

Armor Class 13 (natural armor)
Hit Points 75 (10d10 + 20)
Speed 50 ft.

STR	DEX	CON	INT	WIS	CHA
18 (+4)	13 (+1)	14 (+2)	7 (−2)	12 (+1)	8 (−1)

Skills Perception +5, Stealth +3
Damage Immunities cold
Senses passive Perception 15
Languages Common, Giant, Winter Wolf
Challenge 3 (700 XP)

Keen Hearing and Smell. The wolf has advantage on Wisdom (Perception) checks that rely on hearing or smell.
Pack Tactics. The wolf has advantage on an attack roll against a creature if at least one of the wolf’s allies is within 5 feet of the creature and the ally isn’t incapacitated.
Snow Camouflage. The wolf has advantage on Dexterity (Stealth) checks made to hide in snowy terrain.

Actions

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) piercing damage. If the target is a creature, it must succeed on a DC 14 Strength saving throw or be knocked prone.
Cold Breath (Recharge 5–6). The wolf exhales a blast of freezing wind in a 15-foot cone. Each creature in that area must make a DC 12 Dexterity saving throw, taking 18 (4d8) cold damage on a failed save, or half as much damage on a successful one.

Description

The arctic-dwelling winter wolf is as large as a dire wolf but has snow-white fur and pale blue eyes. Frost giants use these evil creatures as guards and hunting companions, putting the wolves’ deadly breath weapon to use against their foes. Winter wolves communicate with one another using growls and barks, but they speak Common and Giant well enough to follow simple conversations.

Werebear

Medium humanoid (human, shapechanger), neutral good

Armor Class 10 in humanoid form, 11 (natural armor) 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)

Skills Perception +7
Damage Immunities bludgeoning, piercing, and slashing from nonmagical attacks not made with silvered weapons
Senses passive Perception 17
Languages Common (can’t speak in bear form)
Challenge 5 (1,800 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.

Troll

Large giant, chaotic evil

Armor Class 15 (natural armor)
Hit Points 84 (8d10 + 40)
Speed 30 ft.

STR	DEX	CON	INT	WIS	CHA
18 (+4)	13 (+1)	20 (+5)	7 (-2)	9 (-1)	7 (-2)

Skills Perception +2
Senses darkvision 60 ft., passive Perception 12
Languages Giant
Challenge 5 (1,800 XP)

Keen Smell. The troll has advantage on Wisdom (Perception) checks that rely on smell.
Regeneration. The troll regains 10 hit points at the start of its turn. If the troll takes acid or fire damage, this trait doesn’t function at the start of the troll’s next turn. The troll dies only if it starts its turn with 0 hit points and doesn’t regenerate.

Actions

Multiattack. The troll 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: 7 (1d6 + 4) piercing damage.
Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) slashing damage.

Saber-Toothed Tiger

Large beast, unaligned

Armor Class 12
Hit Points 52 (7d10 + 14)
Speed 40 ft.

STR	DEX	CON	INT	WIS	CHA
18 (+4)	14 (+2)	15 (+2)	3 (−4)	12 (+1)	8 (−1)

Skills Perception +3, Stealth +6
Senses passive Perception 13
Languages —
Challenge 2 (450 XP)

Keen Smell. The tiger has advantage on Wisdom (Perception) checks that rely on smell.
Pounce. If the tiger moves at least 20 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 tiger can make one bite attack against it as a bonus action.

Actions

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 10 (1d10 + 5) piercing damage.
Claw. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) slashing damage.

Remorhaz

Huge monstrosity, unaligned

Armor Class 17 (natural armor)
Hit Points 195 (17d12 + 85)
Speed 30 ft., burrow 20 ft.

STR	DEX	CON	INT	WIS	CHA
24 (+7)	13 (+1)	21 (+5)	4 (−3)	10 (+0)	5 (−3)

Damage Immunities cold, fire
Senses darkvision 60 ft., tremorsense 60 ft., passive Perception 10
Languages —
Challenge 11 (7,200 XP)

Heated Body. A creature that touches the remorhaz or hits it with a melee attack while within 5 feet of it takes 10 (3d6) fire damage.

Actions

Bite. Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 40 (6d10 + 7) piercing damage plus 10 (3d6) fire damage. If the target is a creature, it is grappled (escape DC 17). Until this grapple ends, the target is restrained, and the remorhaz can’t bite another target.
Swallow. The remorhaz makes one bite attack against a Medium or smaller creature it is grappling. If the attack hits, that creature takes the bite’s damage and is swallowed, and the grapple ends. While swallowed, the creature is blinded and restrained, it has total cover against attacks and other effects outside the remorhaz, and it takes 21 (6d6) acid damage at the start of each of the remorhaz’s turns.
If the remorhaz takes 30 damage or more on a single turn from a creature inside it, the remorhaz must succeed on a DC 15 Constitution saving throw at the end of that turn or regurgitate all swallowed creatures, which fall prone in a space within 10 feet of the remorhaz. If the remorhaz dies, a swallowed creature is no longer restrained by it and can escape from the corpse using 15 feet of movement, exiting prone.

Polar Bear

Large beast, unaligned

Armor Class 12 (natural armor)
Hit Points 42 (5d10 + 15)
Speed 40 ft., swim 30 ft.

STR	DEX	CON	INT	WIS	CHA
20 (+5)	10 (+0)	16 (+3)	2 (−4)	13 (+1)	7 (−2)

Skills Perception +3
Senses passive Perception 13
Languages —
Challenge 2 (450 XP)

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

Actions

Multiattack. The bear makes two attacks: one with its bite and one with its claws.
Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 9 (1d8 + 5) piercing damage.
Claws. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 12 (2d6 + 5) slashing damage.

Owl

Tiny beast, unaligned

Armor Class 11
Hit Points 1 (1d4 − 1)
Speed 5 ft., fly 60 ft.

STR	DEX	CON	INT	WIS	CHA
3 (−4)	13 (+1)	8 (−1)	2 (−4)	12 (+1)	7 (−2)

Skills Perception +3, Stealth +3
Senses darkvision 120 ft., passive Perception 13
Languages —
Challenge 0 (10 XP)

Flyby. The owl doesn’t provoke opportunity attacks when it flies out of an enemy’s reach.
Keen Hearing and Sight. The owl has advantage on Wisdom (Perception) checks that rely on hearing or sight.

Actions

Talons. Melee Weapon Attack: +3 to hit, reach 5 ft., one target. Hit: 1 slashing damage.

Orc

Medium humanoid (orc), chaotic evil

Armor Class 13 (hide armor)
Hit Points 15 (2d8 + 6)
Speed 30 ft.

STR	DEX	CON	INT	WIS	CHA
16 (+3)	12 (+1)	16 (+3)	7 (−2)	11 (+0)	10 (+0)

Skills Intimidation +2
Senses darkvision 60 ft., passive Perception 10
Languages Common, Orc
Challenge 1/2 (100 XP)

Aggressive. As a bonus action, the orc can move up to its speed toward a hostile creature that it can see.

Actions

Greataxe. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 9 (1d12 + 3) slashing damage.
Javelin. Melee or _Ranged Weapon Attack:__ +5 to hit, reach 5 ft. or range 30/120 ft., one target. _Hit: 6 (1d6 + 3) piercing damage.

Ogre

Large giant, chaotic evil

Armor Class 11 (hide armor)
Hit Points 59 (7d10 + 21)
Speed 40 ft.

STR	DEX	CON	INT	WIS	CHA
19 (+4)	8 (−1)	16 (+3)	5 (−3)	7 (−2)	7 (−2)

Senses darkvision 60 ft., passive Perception 8
Languages Common, Giant
Challenge 2 (450 XP)

Actions

Greatclub. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) bludgeoning damage.
Javelin. Melee or Ranged Weapon Attack: +6 to hit, reach 5 ft. or range 30/120 ft., one target. Hit: 11 (2d6 + 4) piercing damage.