One last step

this mod adds a new, post dragon boss called the corrupter of worlds. legend has it that no sword or bow can harm him...

you can craft a rift with any type of overworld log, both nether logs, a diamond ore and ancient debris, netherack, a nether star and end stone. the lighter can be made with the dragon egg in the center, 4 diamond blocks, one in each corner, and 4 rift blocks in the remaining spacies