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It's obvious why there aren't any heroes from the third game – since it's a new world, where would all those old heroes come from?
Regarding the artifacts – why do you think that "the artifacts are rubbish, everything is copied, blah-blah-blah, the developers have no imagination"? The artifacts are quite appropriate. Dragon scale armor, dwarven equipment, etc. There are no excessively powerful artifacts, and at the same time, none are completely useless. If there were heroes from the third game, but the artifacts were new, would you still be complaining?
