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Stat of a hero that provides protection from Physical damage. The more armor a hero has, the more reduction in damage it provides.


Chiron with 159 armor receives an Auto-Attack for 183 physical damage. Cassandra then uses "Proph-Icy" to increase his armor by 44. He now, at a total of 203 armor takes 156 physical damage on a 2nd Auto-Attack.

From this scenario, we can conclude that an increase of 44 armor from an armor value of 159, or + 27.67%, reduces his damage taken from physical attacks by 14.75%. At lower base armor values that addition of armor would be more beneficial.

  • ARMOR- DMG Taken(PHY)
  • 226....145
  • 203....156
  • 182....168
  • 159....183



As you can see , as armor increases, one receives less and less of a benefit. If this was graphed it would be in the shape of a log curve. This is the idea of how diminishing returns works; as one stat goes up more and more(armor), the other stat is correlated and goes up also, but considerably less and less(PHY dmg taken).

It can be approximated that a difference in 22 armor, creates a difference in rate of reduction of damage taken by about 3.5 damage (Note the difference from 183 to 168, and 168 to 156; 15 and 12 respectively, a difference in 3 in the rate of reduction).



  • Armor Reduction
  • 400...80%
  • 350...77%
  • 300...73%
  • 275...71%
  • 250...69%
  • 225...66%
  • 200...63%
  • 175...60%
  • 150...56%
  • 125...52%
  • 100...47%
  • 75....40%
  • 50....30%
  • 25....13%
  • 0.....0%
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