Seeking a Cure for Grunkie Overlordism

If you read the last campaign session report (and I don't blame you if you didn't - they're more functional than entertaining, the point is to make sure details don't get forgotten when you've got 2-3 weeks between game sessions), you'll see at the tail end the party encountering a group of small lizard-monkies, named "grunkies".

These are just reskinned giant rats.  However, poor dietary hygiene among the grunkies has led to the spread of Grunkie Overlordism, a terrible disease that causes no end of trouble to those who seek to enter the City Underfoot.

Grunkie
No. Enc: 2d10
Alignment: Neutral
Movement: 120' (40')
  Swim: 90’ (30’)
Armor Class: 7
Hit Dice: 1d4 hit points
Attacks: 1
Damage: 1d3
Save: F1
Morale: 8
Hoard Class: XX
XP: 5

Grunkies most closely resemble lizard-headed scaled monkies. They have bluish-green skin, a thick paddle-like tail, and webbed hands and feet.  Adult grunkies are 2’ tall standing.

Juveniles are very docile, and are often kept as pets.  As they mature, they become increasingly aggressive, and are often released into the wild, or in urban environments, flushed down toilets, where they adapt easily to life in the sewers and storm drains of the city.  Packs of grunkies will often attack larger prey, such as humans.

Grunkie Overlord
No. Enc: 1d3
Alignment: Neutral
Movement: 120' (40')
  Swim: 90’ (30’)
Armor Class: 5
Hit Dice: 3
Attacks: 3 (2 claws, 1 bite)
Damage: 1d3/1d3/1d6
Save: F3
Morale: 10
Hoard Class: XX
XP: 65

Grunkie overlordism is a horrible disease caused by the cannibalistic nature of grunkies towards their dead.  This disease infects the pineal glands of the grunkie, and causes it to grow to a massive size, such that they stand 5’ tall.  The heavily-muscled grunkie overlord has a dim intelligence, and often understands a few words of the common speech.

When a grunkie overlord is slain, if the body is not properly disposed of, it is highly likely that 1d3 grunkies will devour the bloated pineal gland in a cannibalistic frenzy, and in turn become grunkie overlords themselves.

Uninfected grunkies will natural serve grunkie overlords, rightfully viewing them as the alpha male (or female) of their pack.  A grunkie overlord is always accompanied by 2d10 normal grunkies.  While the overlord is present, those grunkies will have a morale of 10.