Talk:Magic resistance/@comment-155.56.68.214-20110915122535/@comment-71.17.42.26-20111004040210

Actually, I partially rescind that statement. The gold per effective health is actually constant if you buy more armor or more MR for the same cost as whatever you have already bought.

For example, if you have 2000 HP and 0 armor, the first thornmail you buy will make your effective health 4000 HP. The next thornmail (ignore that you're wasting its unique passive) will make your effective health 6000 HP. Compared to 4000 HP, yes this is only a 50% increase instead of a 100% increase, BUT, you are still getting an effective extra 2000 HP for the same cost.