Prestige

A staple of incremental games, Prestiging! When you prestige (also referred to as a soft-reset), you will be able to start over from scratch in exchange for unique resources (Mainly Prestige Points) that you can spend on the next run. 
These Prestige Points can be spent on Contracts, which are unique to each Faction, and typically provide a heavy bonus to resource output for that Faction.
== Demon Faction - The Boiler(s) ==
There are actually 2 Boilers you will eventually be able to use. Boiler A unlocks at 75 Hell Ashes, and is more focused on gaining Waste. Boiler B unlocks at 210 Hell Ashes, and is more focused on getting you Prestige Points. 
Once you have used Boiler A for the first time, you will unlock Contracts for the Demon Faction.
You are able to add Gears to Boilers to increase their efficiency.
== Undead Faction - Dark Obelisk ==
This unlocks at 75 Bone Flour, and focuses on giving you Dark Mana. 
Provides Dark Mana at the rate of (bone flour*2 /4) and one Undead Faction Prestige Point per bone flour.
You are able to add Gears to the Dark Obelisk to increase its efficiency.
== Drowners Faction - The Chest ==
This unlocks at 75 Magic Powder, and focuses on giving you Energy.
You are able to add Gears to The Chest to increase its efficiency.