Son of Kyuss - CR 4 (Medium Undead)

One of AD&D's slightly grim undead for you today. Fresh from the original Fiend Folio, here is the 5e Son of Kyuss (now with added maggots). 

Son of Kyuss
Medium Undead (Chaotic Evil)
Armour Class: 14 (Natural Armour)
Hit Points
: 44 (8d8+8)
Speed 20'
STR 18 (+4) DEX 11 (+0) CON 13 (+1) INT 5 (-3) WIS 10 (+0) CHA 11 (+0)
Damage Immunities: Poison
Damage Vulnerability: Fire
Condition Immunities: Poisoned, Disease, Exhaustion, Fear
Senses: Darkvision 60'; Passive Perception: +10
Language: As spoken in life
Challenge: 4 (1,100 XP)

Fear Aura: Living creatures that start their turn within 30' of the Son, must make a D.C. 13 Charisma save, or become Frightened of it for 1 hour. Such creatures have the Frightened condition, and must use their actions and movement to get as far away as possible from the monster. They are allowed another saving throw at the end of each subsequent turn to end this effect early. Once they have made the save, they are immune to the fear of that particular Son of Kyuss for 24 Hours.

Regeneration: The Son of Kyuss heals 5 hit points at the start of each turn, as long as it has at least 1 remaining. Damage dealt to it with acid, fire or by a weapon covered in holy water cannot be healed this way.

Rise Again: Unless reduced to 0 hit points by an attack that inflicts acid or fire damage, or by a weapon covered in holy water, the Son of Kyuss is allowed to make a death save at the start of the next round. If successful, it regains 5 hit points, and may continue to fight.
Multiattack: The Son of Kyuss makes two claw attacks.

Diseased Claw: Melee weapon attack, Reach 5', +7 to hit, one target, Hit: 20 (3d6+9) slashing damage, and the target must make a D.C. 15 constitution save or become infected with Worms of Kyuss.


Loathsome Demise: When the Son fails its death save and is slain, all living creatures within 10' of it must make a D.C. 15 Dexterity save or contract Worms of Kyuss, as it explodes in a shower of writhing green maggots.


You are immediately infested with fat, burrowing green maggots, that begin to consume your innards and nerves. Every minute, you must make a D.C. 15 Constitution save. If you fail, your current and total hit points are reduced by 10 (3d6). Every time you fail your saving throw, the save D.C. Increases by a cumulative +1. If you are slain by this foul illness, your body collapses. 1 minute later, it animates as a Son of Kyuss. This disease is actually a curse, and so, a Remove Curse must be cast on you before you can receive succor from a Lesser Restoration or similar curative magics. 

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