Armor Class 13 (natural armor)
Hit Points 66 (6d10 + 18)
Speed 10 ft., climb 10 ft.
Skills Perception +3
Senses darkvision 60 ft., passive Perception 13
Languages Abyssal, Aquan, Common
Challenge 3
Keen Smell. The slug has advantage on Wisdom (Perception) checks that rely on smell.
Spider Climb. The slug can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.
Multiattack. The slug makes two attacks: one with its tentacles and one with its bite.
Tentacles. Melee Weapon Attack: +8 to hit, reach 10 ft., one creature. Hit: 4 (1d4 + 2) poison damage, and the target must succeed on a DC 13 Constitution saving throw or be poisoned for 1 minute. Until this poison ends, the target is paralyzed. The target can repeat the saving throw at the end of each of its turns, ending the poison on itself on a success.
Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 7 (2d4 + 2) piercing damage.
Animate Tentacle. When the slug takes damage in this cave (3), it can use its reaction to animate one of the tentacles of the kraken statue and cause it to make a melee weapon attack (+3 to hit) against one creature within 20 feet of the statue that the slug can see. The tentacle deals 8 (1d8 + 4) bludgeoning damage on a hit.
TTP, p. 18