From the Front Cover:
The fabled Sword of Selfaril is told to bestow wisdom and power upon whomever wields it, so naturally its discovery has caused quite a stir in Mulmaster. All of this is complicated when a masked benefactor claims to not only know the truth about the blade, but also how it can be used to benefit the oppressed people of Mulmaster. Can it truly change Mulmaster for the better? A four-hour adventure for 5th-10th level characters.
From the Introduction:
Welcome to The Sword of Selfaril, a D&D Expeditions adventure, part of the official D&D Adventurers League organized play system and the Elemental Evil storyline season.
This adventure is designed for three to seven 5th-10th level characters, and is optimized for five 8th-level characters. Characters outside this level range cannot participate in this adventure.
The adventure is set in the Moonsea region of the Forgotten Realms, in the city of Mulmaster.