Warforged enhancements (history)

Level 1

 * Healer's Friend I: Benefits from healing spells increased by 10%
 * Construct Thinking I: +2 saving throw against will-based enchantments
 * Warforged Durability I: +2 bonus to Repair and Balance skills

Level 2

 * Inscribed Armor I: Reduces arcane spell failure chance by 5%
 * Warforged Hardiness: +1 bonus on Fortitude saving throws
 * Warforged Constitution I: +1 constitution score

Level 3

 * Construct Thinking II: +3 saving throw against will-based enchantments
 * Warforged Durability II: +3 bonus to Repair and Balance skills

Level 5

 * Construct Thinking III: +4 saving throw against will-based enchantments
 * Warforged Durability III: +4 bonus to Repair and Balance skills

Level 6

 * Healer's Friend II: Benefits from healing spells increased by 20%
 * Inscribed Armor II: Reduces arcane spell failure chance by 10%

Level 7

 * Construct Thinking IV: +5 saving throw against will-based enchantments
 * Warforged Durability IV: +5 bonus to Repair and Balance skills

Level 9

 * Construct Thinking V: +6 saving throw against will-based enchantments
 * Warforged Durability V: +6 bonus to Repair and Balance skills