The pallid wyrm measures in excess of ten, ragged feet; its scales translucent and the meat beneath nigh-insubstantial. Whether gliding in water, over land, or through solid objects, the serpent is practically silent. Not completely silent, however, as a subtle wheeze comes from the undead snake, though the sound is not ophidian in nature. Instead, it reminds one of the last gasps of a dying man.

Clutch of the Grave. The great constrictors of the mire were the first creatures the Fiend of the Moors. were drawn to after his damnation. They were also the first lives he consumed to fuel his undead state. A ranger in life, however, the Fiend learned how to keep enough of the serpents’ souls intact so he might raise them as deathless companions. Like their creature, the slough snakes crave the heat of the living, coiling around their victims, and squeezing until that delicate flame is extinguished.

Slough Snake

Huge undead, unaligned

Armor Class 12

Hit Points 93 (11d12 + 22)

Speed 30ft

Swim 30ft

Str 19 Dex 15 Con 14 Int 1 Wis 10 Cha 3

Saving Throws Str +6

Skills Perception +2

Damage Resistances necrotic

Damage Immunities poison

Condition Immunities blinded, charmed, frightened, grappled, paralyzed, petrified, prone, restrained, stunned

Senses blindsight 10 ft., passive Perception 12

Languages -

Challenge 4 (1,100 XP)

Incorporeal.

The slough snake can move through other creatures and objects as if they were difficult terrain. It takes 1d10 force damage if it ends its turn inside an object.

Spectral Coils.

If the slough snake begins its turn grappling a creature, it may use its bonus action to deal 13 (4d6) necrotic damage to that creature. In addition, whenever the slough snake moves the creature it is grappling also gains the incoporal trait.

Actions

Bite.

Melee Weapon Attack: +6 to hit, reach 10 ft., one creature. Hit: 11 (2d6 + 4) piercing damage.

Constrict.

Melee Weapon Attack: +6 to hit, reach 5 ft., one creature. Hit: 13 (2d8 + 4) bludgeoning damage, and the target is grappled (escape DC 16). Until this grapple ends, the creature is restrained, and the slough snake can't constrict another target.

Reactions

Blood Stalker.

If a creature takes more damage than its current hit dice available, the swarm of bilge barnacles may use their reaction to Move toward that creature.