For anyone that doesn't know, Risk of Rain is a game that gets progressively harder as time goes on. There's a small timer you can view and it displays the current difficulty. I took this general idea and made it so that all of the mobs become stronger as time goes on.
You can surround tools (Swords, Shovels, Hoes, Axes, Pickaxes) in iron in a crafting table to enchant it. This gives it the default enchant for its type. If the item has enchants on it already, it will scale every enchantment up by 1. (Ex: Sharpness I to Sharpness II).
I built this for small use. The idea is you download it, drop it in your plugins folder, and start the server. It's a modified survival honestly. It doesn't do anything else besides make the world around you progressively more dangerous.
How to use:
This was built to pair with another plugin I made called McLeveler. The purpose of that plugin is to provide buffs for gaining xp, and it allows you to survive past 5% difficulty.
It usually takes 3 hours to get to 100% difficulty, you die a lot.
The project is on github Click here