This one shot is for 3-6 characters of 5th level and no homebrew.

A combat and exploration-focused encounter set in the Greying WIldlands that pits adventurers against wild, unruly nature and dark fey creatures. The heroes are tasked to find and rescue a child taken by a coven of hags before they are used as an unwilling test subject in the hags’ dark machinations. The hags reside in the ruins of the elven city Molaesmyr, a city felled by dark magic that has been corrupting the surrounding Savalirwood and its denizens for centuries.