In the wet, hot expanse of the Out-of-Place Jungle, in the Undulating Burgundy Marches of the Westerrealm, a vicious menace stalks the land. Of nasty and mischievous demeanor, these Purple Goblins are a threat to all orderly and weal-loving types in the jungle. Furthermore, they seem to propagate in a remarkable manner: any small- or medium-sized humanoid bitten by a purple goblin turns into one.
Gnap! The first sign a gang (1d4+6) of purple goblins is near is the distinctive "Gnap!"-sound they make. Seeming frivolous at first, the gnapping increases as the purple goblins spy their prey, swelling to a cacaphony of shrill shrieks.
Destructive Menaces: Purple goblins are even more destructive than their greenskinned cousins. They have literally no regard for anything else than spreading havoc and mischief. A gang of purple goblins can overrun a town in no-time, infecting the inhabitants with their condition spreading like wildfire.
Bzzt!-disease: The source of the purple goblin-condition has been traced by arcane and astral sagelike types to be the "Bzzt!-fly", an as yet undiscovered species of tropical insect. The disease, once it gets hold of a humanoid of up to normal human size, rapidly transforms the subject into a purple goblin (or hobgoblin, for larger varieties). After failing the first saving throw, symptoms will start the following round, leaving the target prone and incapacitated on the ground. A gruelling transformation will begin, lasting 1d6 rounds after which the target stands up as a purple goblin, emitting a loud "Gnap!". A cure for the disease has not yet been determined, although it is expected the usual magical means of removing these kinds of conditions would work.
PURPLE GOBLIN
Small humanoid (goblinoid), neutral evil
AC: 13 (natural armor)
Hit Points: 13 (4d6)
Speed: 35 ft.
Str 8 (-1), Dex 16 (+3), Con 10 (+0), Int 8 (-1), Wis 11 (+0), Cha 8 (-1)
Skills: Acrobatics +7
Senses: Darkvision 60 ft., passive Perception 10
Languages: Gnap!
Challenge: 1/4 (50 XP)
Pounce Attack: The purple goblin can jump attack as a bonus action by making an opposed Dexterity (Acrobatics) check. Success grants the purple goblin advantage on its next bite attack.
ACTIONS
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d4+3) piercing damage and the target must make a DC 13 Constitution saving throw or be infected by the Bzzt!-disease.