How to Use the Nether Reactor Core
Obtaining the Core
The Nether Reactor Core is a special block from the mod. It is a crafting-table recipe, so gather the required materials and craft it before you plan to use it. The core is the centerpiece of a reactor structure, so build it somewhere with room around it.
Building the Reactor
Place the Nether Reactor Core and surround it with the required structural blocks to form the reactor. Once assembled, activate the core to trigger the reaction. The reaction spawns hostile mobs and drops loot, so prepare before you start: wear full Studded Armor, bring a bow with Purple Arrows in a Quiver, and clear the area of anything you don't want destroyed.
After the reaction, the core and surrounding blocks change state. Collect the drops and rebuild if you want to run it again. Keep spare building materials on hand so you can reassemble the structure quickly between runs.