Blood Mending

Rebalanced Blood Mending:

• Increased repair amount:
  lvl 1: 10 -> 20
  lvl 2: 30 -> 40
  lvl 3: 50 -> 80
  
• Damage now depends on difficulty:
  Peaceful - 1
  Easy - 1
  Normal - 2
  Hard - 3
  
• Removed safety checks before damaging on Hard difficulty

Misc

• Added enchantment descriptions (viewable via the Enchantment Descriptions Mod and such)