Ender_Dragon's egg duplication.
After go to end and defeat the ender dragon and collect the egg.then go to activated end portal frame and place fences under the portal's black area then build 7-9 blocks upwards then drop 5-7 sands or gravels in portal's black area then drop dragon's egg like gravel or sand ,then when you go to end you'll have two ender_dragon eggs.
version: 1.21.51.02