In this concept, we see how using the dragon egg can create a hidden doorway.. Things to note are: The dragon egg is not picky about where it teleports to, as long as the location is within 15 blocks horizontally and 7 blocks vertically. Signs can be used to block off areas to teleport to, allowing for redstone to travel up a staircase.. The egg is teleported to a shaft, where it drops down like gravel or sand, activating a BUD switch. This switch will toggle a flip flop, opening the door and pushing the dragon egg with a piston for retrieval.. A button is used to switch the flip flop to close the door back up for exiting.. The problem is the range in which it teleports. It would have to be underground where no other teleport space is available.. Social Media. Twitter:.