The End Times

Witches could drop oak wood wands that need upgrade templates to turn them into ore and block finders. A diamond upgrade can help the player find diamonds, an emerald uprade can help the player find emeralds, a pale oak upgrade helps them find pale oak, etc. The upgrades for the wands could ONLY be found in an End Temple. And the End Temple could be a large maze that includes new hostile mobs that guard the temple treasures from the player. The End Temples could be hidden and need a special potion to be able to reveal them to the player. But this specific potion can only be brewed in a special enchanted cauldron that's heated by a soul campfire. The enchanted cauldron can only be found in a Nether castle that's guarded by a new nether boss. In order to get the enchantment for the cauldron you have to defeat the Nether boss. Other smaller updates: New "wild crops" that can be found in each biome and need to be brewed in the enchanted cauldron to get the seeds from them to plant them in gardens.

The End could have a couple of new biomes and the end cities could use some TLC too. They're not looking much like cities. They're a little too small. Maybe expand them a bit and add some End villagers that become hostile if you attack them.