Forgemaster's Hammer ★★

Taken all the way down to base materials, one Forgemaster's Hammer is 3 crafting steps deep and needs 8 intermediates — Adamantite Ingot ×3, Adamantite Rivets ×1, Astral Birch Lumber ×1 and 5 others — which resolve to 15 distinct raw materials totalling 59 units, plus 54 crystals.

That bill outweighs 13,079 of the 13,602 recipes tracked here and 1,790 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 4 of those crystals go into the final step; the other 50 are burned by the intermediates, so the real crystal cost is 20 Fire Crystal, 19 Wind Crystal, 4 Earth Cluster and 5 other kinds.

The chain crosses four disciplines — Blacksmith to Lv 60, Alchemist to Lv 60, Carpenter to Lv 60 and Goldsmith to Lv 56 — so no single class can finish it unaided.

10 of the 15 raw materials come out of the ground, and 6 of them are time-gated: Adamantite Ore (0:00, 2:00, 6:00, 10:00, 12:00, 14:00, 18:00, 22:00), Astral Moraine (0:00, 12:00) and 4 others. The widest gap between consecutive opening times is 4 Eorzean hours, about 12 real-world minutes.

Of the intermediates, Hardsilver Ingot has the widest use: 117 recipes call for it, spanning seven of the eight crafting classes.