In the book across the misty mountains was a very difficult task, I think That Besides the enemies and height Should be something more in the misty mountains, snow, snow MC but not common but a special snow That Gradually you you were sinking even block or a block and a half or so, This would slow down much the players and if the weights of armor They Were Implemented the lightest armor would sink less in snow and heavy would make you sink more and more fast, This would be solved mountain boots be forged with leather shoes and a new item: spikes. These boots reduce the effect of snow and not let you slip on the ice and would have the effect of thorns inherent.Also that being in the higher areas will suffer damage as in the Forodwaith.
In addition under this snow was another that would be much harder to dig at least 10-15 seconds to remove with a shovel iron, this compact snow snow donominaria while the former loose snow would be called. I am sorry for my bad english. constructive feedback is accepted and thanks for reading. =D