Item like the one shown above will drop from mobs globally in wild, nether, and the end. Item tiers will depend on the mob type, so mobs like Wither or Ender dragon will drop the item of best tier. With the coming update, we've also decided to enable keep inventory feature in the cities (PVP will still be available). Along with that, we've also added /rtp feature in the wild so you can not worry about being camped for your life.
The scrolling system will be available to vanilla items within the week.
Side note: cobalt & reinforced equipments are disabled. They will be removed on use.