This. Especially with a ranking system of relative strength.I think a collection of monster powers would be great, maybe arranged by relative strength.
- variant injury rules: long term injuries
- alternative healing rules
You'll want to look at Critical Matters, from Final Redoubt Press.
EN World PDF Store - Final Redoubt Press - Critical Matters (Combat Essentials 1)
It's a book on critical hits. For the most part, people can still heal quickly with healing powers, but if they don't have access, the traumatic damage of a critical effect can take weeks to heal. In addition, it deals with maiming damage and the rituals necessary to heal it.
Books detailing the default planes. I want information in one easy place about the Fey, their mindset, creepy characteristics for the feywild, notable NPC/adversaries or adventures in the feywild.
Traps & Hazards. Grimtooth 4e.
I greatly endorse this book.![]()

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.