AC 15 (natural armor)
HP 123 (13d10 + 52; bloodied 61)
Speed 20 ft., swim 20 ft.
Proficiency +3; Maneuver DC 15
Skills Stealth +3
Damage Resistances cold, fire, piercing
Damage Immunities lightning
Condition Immunities blinded , deafened , fatigue
Senses blindsight 60 ft. (blind beyond this radius), passive Perception 11
Languages —
Acid Absorption. When the sewer walker is subjected to acid damage, it instead regains hit points equal to the acid damage dealt.
ACTIONS
Multiattack. The sewer walker makes two lash attacks. If both attacks hit one Medium or smaller creature, the target is grappled (escape DC 15), and the sewer walker uses Drown against it.
Lash. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 13 (2d8 + 4) bludgeoning damage.
Drown. The sewer walker drags a Medium or smaller grappled creature under its body. The creature is restrained , rattled , can’t breathe , and moves with the sewer walker. At the start of each of the sewer walker’s turns, the target takes 11 (2d6 + 4) acid damage. When the grapple ends, the creature is no longer being drowned. The sewer walker can only be drowning one creature at a time.
Rather than rotting vegetation, a sewer walker is formed by decades of a city’s refuse and filth. Usually appearing as a floating pile of garbage, the vines that bind it together often hang beneath the surface but it can raise itself clear of the water when it attacks or to reach the moss and slime it typically consumes.
Plant creatures are magical fungoid or plant-like creatures. Ordinary plants, such as trees, are not plant creatures. A treant is an intelligent plant creature that resembles a tree.