The Fae's Crown Katana ★★

Taken all the way down to base materials, one The Fae's Crown Katana is 2 crafting steps deep and needs 3 intermediates — Tungsten Steel Ingot ×4, Dwarven Mythril Ingot ×1 and Ethereal Silk ×1 — which resolve to 8 distinct raw materials totalling 44 units, plus 31 crystals.

That bill outweighs 12,337 of the 13,602 recipes tracked here and 1,595 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 27 are burned by the intermediates, so the real crystal cost is 10 Earth Cluster, 10 Fire Cluster, 7 Fire Crystal and 2 other kinds.

The chain crosses two disciplines — Blacksmith to Lv 80 and Weaver to Lv 80 — so no single class can finish it unaided.

4 of the 8 raw materials come out of the ground, and 2 of them are time-gated: Ethereal Cocoon (8:00, 20:00) and Tungsten Ore (10:00, 22:00). The widest gap between consecutive opening times is 10 Eorzean hours, about 29 real-world minutes.

Of the intermediates, Dwarven Mythril Ingot has the widest use: 168 recipes call for it, spanning seven of the eight crafting classes.