The Stygian Society: The Tower Laboratory

From the publisher:

The Tower Laboratory takes place in America during the early part of the 20th century. Four new heroes include the psychic, mechanic, electrical engineer, and chemist. Each has a new accompanying set of skills!
This expansion also includes two new mini-bosses, two new bosses (including the mad scientist seen here), a bunch of new enemies, and lots more treasure!

This is an expansion! You need the core game The Stygian Society to play with it!