Jörmungandr — The World Serpent Around Midgard

Amphibious.
Jörmungandr can breathe air and water.

Legendary Resistance (4/Day).
If Jörmungandr fails a saving throw, he can choose
to succeed instead.

Magic Resistance.
Jörmungandr has Advantage on saving throws against
spells and other magical effects.

Siege Monster.
Jörmungandr deals double damage to objects and structures.

World-Encircling Body.
This stat block represents Jörmungandr’s head, neck
and those nearby portions of his immense body that
directly affect the encounter.

Distant portions of the World Serpent are part of
the environment rather than independent creatures
or separate Hit Point pools.

Damaging a distant section of his body does not
reduce Jörmungandr’s Hit Points unless a specific
encounter creates a separate vulnerable objective.

Multiattack.
Jörmungandr makes three attacks: one Bite and two
Coil Strikes.

Bite.
Melee Attack Roll:
+21, reach 30 ft., one target.
Hit:
51 (6d12 + 12) Piercing damage.

If the target is a creature, it must make a DC 28
Constitution saving throw.

On a failed save, it takes 27 (6d8) Poison damage
and has the Poisoned condition until the end of its
next turn.

On a successful save, it takes half as much Poison
damage and isn’t Poisoned.

If the target is Huge or smaller, Jörmungandr can
also Grapple it in his jaws (escape DC 29).
Until the grapple ends, the target has the
Restrained condition.

Jörmungandr can hold one creature in his jaws at a time.

Coil Strike.
Melee Attack Roll:
+21, reach 60 ft., one target.
Hit:
38 (4d12 + 12) Bludgeoning damage.

If the target is Huge or smaller, it must succeed
on a DC 29 Strength saving throw or be Grappled by
Jörmungandr (escape DC 29).

Until the grapple ends, the target has the
Restrained condition.

Jörmungandr can have up to three creatures
Grappled by his coils at once.

Constrict.
Each creature currently Grappled by one of
Jörmungandr’s coils takes 48 (8d8 + 12)
Bludgeoning damage.

Swallow.
Jörmungandr makes a Bite attack against a Huge or
smaller creature Grappled in his jaws.

On a hit, the target takes the Bite’s damage,
is swallowed, and the grapple ends.

While swallowed, the creature has the Blinded and
Restrained conditions, has Total Cover against
effects originating outside Jörmungandr, and takes
44 (8d10) Acid damage plus 44 (8d10) Poison damage
at the start of each of Jörmungandr’s turns.

If Jörmungandr takes 80 or more damage during a
single turn from creatures inside him, he must
succeed on a DC 28 Constitution saving throw at the
end of that turn or regurgitate all swallowed creatures.

Regurgitated creatures appear Prone in unoccupied
spaces within 30 feet of his head.

Eitr Breath (Recharge 5–6).
Jörmungandr exhales corrosive venom in a 120-foot Cone.
Each creature in that area must make a DC 28
Constitution saving throw.

On a failed save, a creature takes 66 (12d10) Acid
damage plus 66 (12d10) Poison damage and has the
Poisoned condition for 1 minute.

On a successful save, it takes half as much damage
and isn’t Poisoned.

A Poisoned creature repeats the saving throw at the
end of each of its turns, ending the condition on
itself on a success.

Tidal Surge (Recharge 6).
Jörmungandr violently displaces the sea in a
150-foot-long, 30-foot-wide Line.

Each creature in the area must make a DC 29
Strength saving throw.

On a failed save, a creature takes 66 (12d10)
Bludgeoning damage, is pushed up to 60 feet away
from Jörmungandr and has the Prone condition.

On a successful save, it takes half as much damage
and is neither pushed nor knocked Prone.

World Tremor (Recharge 6).
Jörmungandr shifts a colossal portion of his body.

Each other creature on the ground, on a vessel, or
on the surface of the water within 60 feet of
Jörmungandr must make a DC 28 Dexterity saving throw.

On a failed save, a creature takes 36 (8d8)
Bludgeoning damage and has the Prone condition.

On a successful save, it takes half as much damage
and isn’t knocked Prone.

Coiling Intercept.
When a creature Jörmungandr can see moves within
60 feet of him, he makes one Coil Strike against
that creature.

Slither.
Jörmungandr moves up to half his Speed or Swim Speed
without provoking Opportunity Attacks.

Coil Strike.
Jörmungandr makes one Coil Strike.

Constrict (Costs 2 Actions).
Jörmungandr uses Constrict.

Eitr Spit (Costs 2 Actions).
Jörmungandr spits a mass of venom at a point he can
see within 120 feet.

Each creature in a 20-foot-radius Sphere centred
on that point must make a DC 28 Dexterity saving throw.

On a failed save, a creature takes 33 (6d10) Acid
damage plus 33 (6d10) Poison damage.

On a successful save, it takes half as much damage.

Tidal Crush (Costs 3 Actions).
Each creature within 30 feet of Jörmungandr must
succeed on a DC 29 Strength saving throw or take
48 (8d8 + 12) Bludgeoning damage, be pushed up to
30 feet and have the Prone condition.

A successful save halves the damage and prevents
the push and Prone condition.

Final Eitr.
When Jörmungandr is reduced to 0 Hit Points, his
dying breath fills the area with concentrated eitr.

Each other creature within 120 feet of his head
must make a DC 28 Constitution saving throw.

On a failed save, a creature takes 55 (10d10) Acid
damage plus 55 (10d10) Poison damage and has the
Poisoned condition for 1 minute.

On a successful save, it takes half as much damage
and isn’t Poisoned.

A Poisoned creature repeats the save at the end of
each of its turns, ending the condition on a success.

Jörmungandr does not possess a conventional lair.
Instead, the sea and coastline around any portion
of the World Serpent that becomes unusually active
begin to reflect his presence.

While Jörmungandr’s head or a major active portion
of his body is within a region, the following effects
occur within 10 miles of that location.

• Restless Sea.
  Calm water becomes heavy swell within minutes.
  Currents change without warning, waves strike
  coastlines in otherwise still weather, and
  small craft are noticeably harder to control.
• Eitr-Tainted Water.
  Water within 1 mile of Jörmungandr’s head or
  an exposed wounded coil develops an acrid,
  metallic taste and faint green-black discoloration.
  A creature that drinks untreated water from
  this area must succeed on a DC 18 Constitution
  saving throw or have the Poisoned condition
  for 1 hour.
• Flight of the Deep.
  Ordinary aquatic animals instinctively flee.
  Fish shoals disappear, whales alter course,
  and marine predators abandon otherwise familiar
  hunting grounds.
• Serpent Tremors.
  Minor earthquakes and submarine tremors occur
  intermittently. Loose objects shift, anchored
  vessels strain at their moorings, and unstable
  cliffs, sea caves and coastal ruins can collapse.
• Venomous Storms.
  Storm clouds gather with unnatural speed above
  waters disturbed by Jörmungandr. Sea mist has
  a bitter metallic scent, rain may leave a thin
  oily residue, and lightning sometimes carries
  a pale green cast.
• The Coil Beneath.
  At the DM’s discretion, immense serpent-like
  ridges become visible beneath the sea, sometimes
  stretching beyond the horizon. These are portions
  of Jörmungandr’s body rather than separate
  creatures and cannot normally be attacked as
  independent targets.

Most regional effects end within 1d6 hours after
Jörmungandr becomes quiescent or the active portion
of his body leaves the region. Eitr contamination
can persist for 1d6 days. Physical damage caused by
tremors, altered channels, flooding or collapsing
coastlines remains until repaired or naturally changed.

Jörmungandr has 520 skill ranks from his 65
outsider Hit Dice and Intelligence 10.

He has 65 ranks each in Concentration, Intimidate,
Knowledge (nature), Knowledge (the planes), Listen,
Sense Motive, Spot and Swim.

The bonuses shown in the stat block include ability
modifiers, Alertness where applicable, and the
racial Swim bonus granted by his swim speed.

Jörmungandr is immune to polymorphing,
petrification and hostile form-altering effects.
He is not subject to energy drain, ability drain,
ability damage or death from massive damage and is
immune to mind-affecting effects and acid.

He has cold resistance 20 and fire resistance 20,
continuous nondetection and true seeing,
blindsight 500 feet, darkvision 60 feet and
telepathy 1,000 feet.

Greater Divine Blood (Ex).
This legacy special quality represents
Jörmungandr’s supernatural ancestry and his status
among the greatest abominations.

It does not make him a deity and does not allow him
to grant spells, domains or divine rank to worshippers.

For legacy rules that compare an effect directly
with divine rank, Jörmungandr is treated as
equivalent to divine rank 18 solely for resisting
or interacting with that effect.

He does not automatically fail an attack roll or
saving throw on a natural 1.

In addition to his abomination immunities, he is
immune to disease, stunning, paralysis, death
effects and disintegration.

These additional divine-blood immunities can be
overcome by an effect produced directly by a deity
of divine rank 18 or higher.

World-Encircling Body (Ex).
Jörmungandr’s complete body is too large to
function as a conventional single miniature or
hit-point pool.

Only his head, neck and encounter-designated
vulnerable sections are treated as ordinary combat targets.

The head has the hit points given above and fast
healing 500. Distant coils are treated as terrain,
grappling hazards or environmental effects.

Damage to those distant sections does not reduce
the head’s hit points.

Breath Weapon (Su).
Once every 1d4 rounds Jörmungandr can use one of
two breath weapons.

• Corrosive Eitr:
  90-foot cone; 24d10 damage, half acid and half
  poison; Reflex DC 62 half. A creature that
  fails the save is also exposed to
  Jörmungandr’s bite-strength eitr at its current
  save DC.
• Acid Torrent:
  180-foot line; 24d10 acid damage;
  Reflex DC 62 half.

The save DC is Constitution-based.

Constrict (Ex).
Jörmungandr can begin a constriction either after
establishing a hold with his bite or by making the
independent constrict touch attack given in the
stat block.

A creature held in one of his coils takes
16d10+27 points of bludgeoning damage whenever
Jörmungandr wins an opposed grapple check to damage it.

The number of coils physically available is
determined by the encounter, but Jörmungandr can
initiate only one new independent constriction each round.

A creature can escape normally with an opposed
grapple check or an
Escape Artist
check.

Improved Grab (Ex).
If Jörmungandr hits with his bite, he can attempt
to start a grapple as a free action without
provoking an attack of opportunity.

He can use improved grab against creatures of any
size. If he establishes a hold, he may constrict
the victim.

Eitr (Su).
Jörmungandr produces supernatural venom capable of
threatening beings far beyond the scope of ordinary poison.

Poisonous Exhalation:
A creature within 50 feet of Jörmungandr’s head
must attempt a Fortitude save at the beginning of
its turn.

The save DC is 35 within 50 feet, 30 at 51–70 feet,
25 at 71–90 feet and 20 at 91–110 feet.
Failure deals 1d8 Constitution damage as initial
and secondary damage.

Bite Eitr:
Injury; Fortitude DC 60; initial damage
4d8 Constitution; secondary effect death.

Eitr is supernatural and is not defeated by
ordinary poison immunity. A creature normally
immune to poison instead gains a +20 resistance
bonus on its saving throws against bite eitr.

The save DC for bite eitr begins at 60.
It increases by 4 at the end of every round in
which Jörmungandr remains in active combat and by
2 whenever a successful attack or damaging spell
deals damage to his head.

The DC cannot exceed 100. If his head suffers no
damage for 7 consecutive rounds, the DC returns to 60.

At this epic scale, magic originating from a deity
of divine rank 18 or higher with direct mastery of
healing can neutralize the supernatural secondary
effect at the DM’s discretion.

Ordinary neutralize poison does not remove bite eitr.

Eitr separated from Jörmungandr’s body loses its
supernatural potency after 24 hours unless
preserved by epic or divine magic.

Final Eitr (Su).
When Jörmungandr is slain, his head releases a
dense cloud of eitr in a 100-foot radius.

Every other creature in the area must immediately
save against bite eitr using the current eitr DC
at the moment of his death.

Swallow Whole (Ex).
If Jörmungandr begins his turn with a Gargantuan or
smaller creature held in his jaws, he can attempt
another grapple check.

If he succeeds, he swallows the creature and deals
his bite damage.

A swallowed creature takes 4d8 points of
bludgeoning damage, 2d8 acid damage and 2d8 poison
damage each round.

It must also succeed on a DC 45 Fortitude save each
round or take 2d8 Constitution damage as initial
and secondary poison damage.

A swallowed creature can attempt to escape by
winning an opposed grapple check. Success returns
it to Jörmungandr’s mouth.

Cutting an exit through distant sections of the
serpent is ineffective because World-Encircling
Body immediately closes such wounds.

Summon (Sp).
Once per day Jörmungandr can summon either two Huge
water drakes or one Gargantuan dragon turtle.

This is retained as an edition-specific legacy
ability and does not imply that these creatures are
mythological servants of Jörmungandr.

At will
— fear, greater dispel magic, control winds,
solid fog

3/day
— acid fog, blasphemy, control weather,
legend lore, suggestion

1/day
— storm of vengeance

Caster level 40th; save DC 21 + spell level.
Save DCs are Charisma-based.

The environmental disturbances caused by Jörmungandr
manifest only around portions of his body that are
actively moving, exposed, wounded or otherwise
participating in events.

Within approximately 10 miles of such a location,
the following conditions apply.

• Unquiet Waters:
  Swim checks and Profession (sailor) checks take
  a –4 penalty because of unnatural currents and swell.
• Eitr-Tainted Water:
  Water within 1 mile of Jörmungandr’s head or
  an exposed wounded coil becomes mildly poisonous.
  Creatures drinking untreated water must succeed
  on a DC 25 Fortitude save or become sickened
  for 1 hour.
• Fleeing Sea Life:
  Ordinary marine animals avoid the region.
  Survival checks made to find or catch normal
  aquatic animals take a –10 penalty.
• Submarine Tremors:
  Unstable coastal structures, cliffs, caves and
  ruins may suffer structural damage when tremors occur.
• Storm Disturbance:
  If natural severe weather is already present,
  wind and wave conditions are treated as one
  step more severe within the affected area.

Most effects fade within 1d6 hours after the active
portion of Jörmungandr becomes quiescent.
Eitr contamination persists for 1d6 days unless
removed by appropriate magic.