Remorhazes

From beneath the snow and ice bursts a remorhaz in a cloud of steam, its body pulsing with internal fire. Winglike fins flare from the back of the creature's head, and its wide mouth brims with jagged teeth.
Arctic Predators Remorhazes live in arctic climes, preying on elk, polar bears, and other creatures sharing their territory. They can't tolerate warm weather, having adapted to the cold by generating a furnace-like heat within their bodies. When hunting, a remorhaz burrows deep below the snow and ice and lies in wait for the faint vibrations created by a creature moving above it. While hidden under the ice and snow, it can lower its body temperature so that it doesn't melt its cover.
Young Ones Frost giant hunters scour the icy wastes for remorhaz nests and eggs. The giants prize young remorhazes, which can be trained from hatching to obeycommands and guard the giants' icy citadels. Unlike fully grown specimens, young remorhazes gnaw on their victims instead of swallowing them whole.

Young Remorhaze

Young Ones Frost giant hunters scour the icy wastes for remorhaz nests and eggs. The giants prize young remorhazes, which can be trained from hatching to obey commands and guard the giants' icy citadels. Unlike fully grown specimens, young remorhazes gnaw on their victims instead of swallowing them whole.

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Armor Class	14 (natural armor)
Hit Points	11d10+33
Speed	30 ft.	Burrow 20ft.
Strength	18 (+4)
Dexterity	13 (+1)
Constitution	17 (+3)
Intelligence	3 (-4)
Wisdom	10 (+0)
Charisma	4 (-3)
Damage Immunities	Cold	Fire
Senses	Darkvision 60 ft.	Rremorsense 60ft.	Passive Perception 10
Languages	---
Challenge	5 (1 ,800 XP)
Special	Heated Body	A creature that touches the remorhaz or hits it with a	melee attack while within 5 feet of it takes 2d6 fire damage
Action	Bite	Melee Weapon Attack	d20+6 to hit
Reach 5 ft., one target	Hit 3d10+4 piercing damage	plus 2d6 fire damage

Remorhaze

From beneath the snow and ice bursts a remorhaz in a cloud of steam, its body pulsing with internal fire. Winglike fins flare from the back of the creature's head, and its wide mouth brims with jagged teeth.

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Armor Class	17 (natural armor)
Hit Points	17d12+85
Speed	30ft.	Burrow 20ft.
Strength	24 (+7)
Dexterity	13 (+1)
Constitution	21 (+5)
Intelligence	4 (-3)
Wisdom	10 (+0)
Charisma	5 (- 3)
Damage Immunities	Cold	Fire
Senses	Darkvision 60 ft.	Tremorsense 60 ft.	passive Perception 10
Languages	---
Challenge	11 (7,200 XP)
Special	Heated Body	A creature that touches the remorhaz or hits it with	a melee attack while within 5 feet of it takes 3d6 fire damage
Action 1	Bite	Melee Weapon Attack	d20+11 to hit
Reach 10ft., one target	Hit 6d10+7 piercing damage	plus 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
Action 2	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 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