Where did the obelisks disappear to?

They disappeared from single-player mode and campaigns. I completed the entire "The Restoration of Erathia" campaign, and there wasn't a single obelisk. Also, I noticed that the unique abilities of creatures have changed. For example, Minotaurs used to have the ability to block attacks, and ranged creatures had abilities like dealing 1/2 or full damage in melee combat. HD mod 5.2