Neomenia

This mod tries to fix and improve forgotten or poorly polished mechanics. It also introduces a new mechanic: a HARDMODE similar to the one in Terraria! Enjoy a new way of playing Minecraft with expanded possibilities once you beat the Ender Dragon.

The mod improves mobs by adding or changing a few features, staying as vanilla-like as possible. For example, the Sniffer gets a brand-new plant, and its two vanilla plants get new uses.

Instead of coming with a traditional tutorial book, the mod brings a new companion to your adventure: a Cobble Golem that will convert your XP into knowledge about all the new items in the mod.

Once you defeat the dragon, all aggressive mobs will become stronger than ever. However, the world will also transform—granting you new weapons, armor, and much more, giving you plenty of reasons to keep playing and re-exploring the world.