The End Gateway spawns after the Ender Dragon is killed in The End; up to twenty End Gateways can be generated by respawning and re-killing the Dragon. It leads to the outer islands of the End, which are a thousand blocks away from the central island, where End Cities and Chorus Plants generate. If a player has previously killed the Ender Dragon before the 1.9 update, they must respawn the Dragon and then kill it again for the End Gateway to appear.
Throughout the End, more End Gateways will generate as a player respawns the Ender Dragon and kills it. The maximum amount of End Gateways that can be created is 26. These aid a player in getting back to the main island: when entered, a player is taken back to the obsidian platform where they spawned, although it will not trigger the reformation of the platform.
Since the End Gateway is made of unbreakable blocks, a player must find a way to squeeze himself/herself through the one-block gap on the sides. There are many ways to accomplish this; etc. throwing an Ender Pearl into the End Gateway to be teleported, placing water nearby to swim into it, or by crawling by the use of pistons and a block, or trapdoors. It transports players into the Outer End, or back to the main island for return End Gateways.
If a player switches to Creative Mode, they will be able to mine the End Gateway, and it makes the same sound as glass breaking.
In Creative Mode, if a player breaks it, they will discover that inside the bedrock shell it is a 3 by 1 gap (one block of air above and below portal block).
If a player builds a bridge about 1000 blocks away from the main island, they will bridge towards the outer end islands. This means that the player can go to the outer end without killing the ender dragon.
