Huge Beast
AC 14 Natural Armor    Initiative +1 (11)
HP 115 (10d12 + 50)
Speed 30 ft., Swim 50 ft.
Mod Save
STR 19 +4 +7
DEX 12 +1 +1
CON 20 +5 +8
Mod Save
INT 5 −3 −3
WIS 10 +0 +0
CHA 5 −3 −3
Skills Stealth +5
Immunities Poison; Poisoned
Senses Darkvision 60ft; Passive Perception 10
Languages None
CR 7 (XP 2,900; PB +3)
Traits

Undead Fortitude. If damage reduces the corrupted to 0 hit points, it must make a Constitution saving throw with a DC of +10, the damage taken, unless the damage is radiant or from a critical hit. On success, this corrupted drops to 5 hit points instead.

Unusual Nature. This corrupted doesn't require food, air, drink, or sleep.

Ambush Camoflauge. Whille motionless, the Necrosaur is identical looking from its surroundings. Creatures must succeed on a DC 14 Wisdom (Perception) check to notice it.

Actions

Multiattack. The crocodile makes one Bite attack and one Tail attack.

Bite. Melee Attack Roll: +8, reach 5 ft. Hit: 21 (3d10 + 5) Poison damage. If the target is a Large or smaller creature, it has the Grappled condition (escape DC 15). While Grappled in this way, the target has the Poisoned condition, and at the start of each of its turns, it takes 2 (1d4) poison damage. If the target is both Grappled and Poisoned in this way, it has disadvantage on checks made to escape the grapple.

Tail. Melee Attack Roll: +8, reach 10 ft. Hit: 18 (3d8 + 5) Bludgeoning damage. If the target is a Large or smaller creature, it has the Prone condition.

Bonus Actions

Death Roll. Bonus Action: The necrosaur twists violently while grappling a creature. The grappled target takes 7 (2d6) bludgeoning damage and must succeed on a DC 13 Strength saving throw or fall Prone.

Description

The Necrosaur lies half-submerged, its massive body bloated, covered in pus sacs, and split along the skin, showing the rot that had taken over. Cracked scales hang loose, along with its dark, soft flesh and split jaw. Something beneath these creatures shifts at the wrong pace, as if something in the body no longer fully belongs to itself anymore. Necrosaurs don't breathe, they don't blink, and they don't sleep. They wait until the moment prey comes too close. Then it erupts forward with sudden, violent force, jaws snapping shut as it latches on and refuses to release. Even as its body tears and decays, it continues to move, driven by something that doesn't tire, doesn't think, and doesn't stop. The Necrosaur will wait until the next life force comes to it. 

Previous Versions

Name Date Modified Views Adds Version Actions
4/23/2026 2:14:12 AM
1
0
5e
Coming Soon
4/24/2026 11:02:59 PM
2
0
--
Coming Soon

Monster Tags: undead

Habitat: CoastalSwamp

ravenflwr05

Comments

  • To post a comment, please or register a new account.
Posts Quoted:
Reply
Clear All Quotes