From publisher blurb:
"Into the Vault of the Sea Goddess” is a 5th Edition adventure designed for a party of four 5th to 7th-level characters, which is intended to take them to as high as 8th level and lay the groundwork for continuing scenarios and advancement. It can be run either as a self-standing adventure or as a sequel to Skirmisher Publishing’s “At the Shrine of Othrys” campaign-length 5E adventure, which is intended to take a party of adventurers from 1st to 5th level.
This 70-page adventure includes:
● A complete, detailed scenario with multiple wilderness encounter areas and a multi-level dungeon.
● A small sandbox environment — the Goat Islands — that include random encounter tables, weather tables, and background information, allowing the adventure to be run as a mini-campaign and to easily be inserted into any maritime setting.
● More than 30 monsters, including the Coral Golem, Dagonian Hag, and Giant Cyclopean Goat.
● Expanded rules for Underwater Adventuring.
● An annotated table of "20 Oddities for a Submerged Temple" that can be used to customize the dungeon.
● Numerous custom illustrations and multiple regional, area, encounter area, and dungeon maps.
● Guidelines on level adjustments to allow this adventure to be run for parties as low as 4th and as high as 8th level.
● A section of custom rules designed to help 5E games run more quickly, easily, and smoothly.
● Four detailed, ready-to-use, 6th-level characters.