Craft the Chaos Chakram the using 8 red ingots, a creative cog, 4 purple ingots and the tingalium ingot.
Or craft the Cog Calibur using Blade of Thought, 2 creative cogs, and 16 red ingots
Or craft the Fear Falchion using grey sword, 2 fear fog, and 4 purple ingots.
Or craft the Knife of Dark Secrets using the Knife of Knowledge, 2 fear fog, and 4 purple ingots.