Transmutation Circles, "Part Three: Drawing Transmutation Circles". Full Metal Alchemist / Hagane No Renkinjutsushi
This lady used her crock pot every day for a year, and didn't repeat a recipe. Here's her collection of recipes. Pin now, read later!
A real-life Lance of Longinus (Evangelion). It took a Japanese smith with 40 years of experience six months and the equivalent of 20 swords' worth of steel to craft the weapon.