SimpleOres add-on: Adds a very rare, tainted, toxic ore found in the Nether.
Fusion recycling of cthon items
Steve wearing a full set of Cthon armor and carrying a cthon sword.
Screenshot of Cthon creative tab, showing items.
Cthon ore in the wild in the Nether (classic textures)
Use the fusion furnace to create the intermediate product, then smelt it to get ingots.