The Veins of Evil

Description
The Veins of Evil are, essentially, a Tech Tree. At the moment, there are three: Sloth, which will focus on Defense (i.e wall upgrades, Traps, Doors etc.), Greed, which will focus on the Economy (Treasury, and the similar things), and Wrath, which will focus on Attack (Training Room and such). At the moment, it is known that players will slowly accumulate Tech Points, which can be spent on anything you have not learned of in any of the Veins of Evil. Building an Archive, and having a Cultist working in it will increase the rate at which the player gains Tech Points.

At the moment, it is unknown (to any other than the Dev Team) whether the Veins of Evil will be consistent throughout the Campaign, or will reset at the start of each Mission