Mine Ancient Debris in the Nether
Smelt Ancient Debris in a furnace, blast furnace, or smoker to get Netherite Scrap
Combine 4 Netherite Scrap and 4 Gold Ingots in a crafting table to make 1 Netherite Ingot
Use Netherite Ingots with Diamond gear in a Smithing Table to upgrade it to Netherite gear