I like the idea of the water bowl and iron's rusting
What would happen if the water bowl hit an ice block?
and annother idea: like fusionating some materials like: l=iron f=wood
You mean like combining food and iron into one? I don't really see what good this will do. All that I could see happening is people getting confused on how to destroy these materials. The more people who get confused with the game, the lesser the chance of people replaying it.