User blog comment:Obyvvvatel/Magic resistance isn't effective./@comment-5266525-20130516184954/@comment-5955640-20130518010212

I couldn't find the quote where you explained on why you thought the Force of Nature was removed. So i'll just use the phrase mentioned in page for the item itself.

"The item was removed because the stats it gave didn't synergize with each other, and it provided too much magic resistance in one item. The passive was given to Warmog's Armor and  Spirit Visage was given more magic resist to serve as a different end-game MR item."