Small to Medium undead, true evil

Armor Class: 11 (natural armor)

Hit Points: 78hp (16d6+18)

Speed: 20 ft , climb: 20 ft

STR

14 +2

DEX

10 +0

CON

15 +2

INT

5 -3

WIS

5 -3

CHA

5 -3

Saving Throws: +2 DEX

Damage Vulnerabilities: Fire, Radiant

Damage Resistances: Slashing, Bludgeoning, Acid

Damage Immunities: Cold, Necrotic, Poison

Condition Immunities: Grappled, Deafened

Senses: Blindsight. 60ft.

Languages: None

Challenge Rating: 2

Proficiency Bonus: +3

Actions

Leap. As an action, this creature can jump 15ft. in any direction, ignoring difficult terrain. If this creature moves into a space occupied by another creature with this ability, this creature may make a Slam attack against that creature.   Slam. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 15 (3d8 + 3) bludgeoning damage and the target must make a DC 12 Constitution Saving Throw. On a failed save, the target gains 1 Mucus Token.

Usual Tactics

Shadowfell Slugs unlike many monster corrupted by the shadowfell do not gain much improvement in their intelligence from the many slugs they were individually prior to its transformation. As such, the main "tactic" of the Shadowfell Slug is to swarm individual targets and down them as soon as possible. Shadowfell Slugs found working together will attempt to work together to down the same target, but usually not more than 3 at a time.   Once a target has been slain and no immediate danger presents itself to them, they will find any fresh cadavre (one that has not perished for a period of time greater than a handful of days) and spend 10 minutes draining the creatures blood and bodily fluids, and replacing them with their mucus, in an attempt to make a Maggot Man.