After the reactor core block was interacted with, the Nether Spire would spawn with several floors and rooms. This structure was completely generated with netherrack blocks.

Some great features removed from Minecraft Pocket Edition 7) Nether Reactor Nether Reactor was a player-built structure from which players obtained Nether-related items in Minecraft Pocket Edition.

The Nether changed a lot back in the 1.16 update, but there are still many ways in which the Minecraft dimension could improve.