Iron arrows can be used by everyone without skills. And again Empty scroll is all items and skills in the game. There are bunch of items that help you if you know how to maximize their use. But just like iron arrows can become huge help with correct layout, empty scroll is overpowered to the point of almost breaking the game with enough knowledge.
I don't really know what you are expecting, because those same items are pretty good in endgame as well. If you want some game breaking items, this is really not the kind of game, because there are no such items even in the end.