The next step is to fill in the holes between the gold with cobblestone and place one cobblestone on top of every gold.
Place the nether reactor in the middle.
Place a cobble stone on that.
I changed it to survival via pocket inveditor. You tap the reactor with a sword. I believe u need iron or better. I'm using diamond.
So that's how you build one!
- 4 gold
- Lots of cobblestone
- Nether reactor