This mod makes the game much harder. It makes mobs more intelligent progress have more in between steps. But it also brings new plants a fun changes.
A copper chunk floating in coral reef
Steve in the desert wearing a forgotten armor
A rare trophy item with 1/100 chance to obtain it while killing chicken with silk touch tool
Heavy tool used to behead mobs. When slaying mobs with this weapon they drop special loot
Handy device that shows your temperature