HINT: If you have trouble with the Lich, it means you need to learn to better specialize your runs to focus on certain player stats over others. Each boss has been changed to have only certain weaknesses that you have to exploit in order to even have a chance. The Lich has a LOT of defense, so you gotta find ways around that. You gotta specialize in similar ways to beat the other bosses and the difficulty in CH.4 is that you'll have to find builds that can kill all 3 of them (or skip one or two).

For a detailed description I recommend you read the 15 readme in the mod folder.
There are just too many changes to list here, but I will highlight a few:

- All enemies have +25% ATK & +50% HP.
- Increased enemy scaling per loop & per chapter.
- Changed enemy stat weights to better fit their abilities & lore.
- Reworked the loot pool so that loot strength is proportional to monster threat level.
- Buffed certain player stats to all be equal.
- Buffed/nerfed almost all traits, so that each is worth considering.
- Buffed/nerfed almost all supply items, so that each is worth considering.
- Reworked the entire Necromancer class.
- Changed card weights to prevent hand cluttering.
- Made each Boss distinctly difficult to require special strategies.
- Reworked the entire camp building tree & the building's effects.
- And much MUCH MUUUCH more!

I recommend starting a new save-file to get the best experience. Also to prevent bugs with old camp layouts violating new camp building rules.