Hall Creeper

A medium shapechanging monstrosity that can polymorph into Small or Medium humanoids it has seen. It uses this ability to mimic allies and ambush victims. It has advantage on attacks against surprised creatures and can use a life leech attack that deals necrotic damage and reduces the target's hit point maximum. It can climb walls and uses stealth and deception to hunt its prey.

Featured In Modules

This lore entry is featured in the following adventure modules:

Dungeons and BiomancyMaster Thalin Fernstride sends adventurers with Sage Elbera to investigate a newly opened dungeon beneath the royal castle in Kingdom Grand. The dungeon contains strange stone containers filled with viscous liquid, moss-covered floors that induce madness, and shadows that move in the corners. They discover a laboratory with notes on biomancy experiments involving yetis, owlbears, and other monstrosities, as well as maps pointing to the door found in the Ancient Secrets adventure. In the central chamber, they find stone slabs depicting The Evil One creating an egg meant to destroy the world. They are ambushed by Hall Creepers that mimic their allies before escaping with evidence of recent cult activity.