This behavior pack allows you to create unused blocks such as glowing obsidian or a nether reactor core! But that’s not only that, because there are 12 different recipes to choose and craft!
Here is a list of crafting recipes of the addon:
End Portal Gateway:
Nether Reactor Core:
Note: This behavior pack is not intended and not recommend for survival. Using this on survival may spoil your enjoyment (because of the nether and end portal).
Also, I only recommend to use this for creative mode and for creating a map using some unused blocks.