1. Kill the Elder Guardian for the new sigil.
2. Use the sigil, an iron ingot, and a diamond in the form of the original crafting recipe to create the ingot.
3. Use two ingots and an obsidian block in the form of a sword to create the base sword.
4. Use 4 Wither Stars around the base sword, the bottom with two netherite ingots, a pink tulip in the top left, and a player head in the top right to create the weapon!