The Holy Key of Tremors ★★★

Taken all the way down to base materials, one The Holy Key of Tremors is 2 crafting steps deep and needs 2 intermediates — Terminus Putty ×10 and Enchanted Gold Ink ×1 — which resolve to 7 distinct raw materials totalling 34 units, plus 27 crystals.

That bill outweighs 11,052 of the 13,602 recipes tracked here and 1,407 of the 1,591 Alchemist ones, and 4,464 recipes nest deeper.

Only 12 of those crystals go into the final step; the other 15 are burned by the intermediates, so the real crystal cost is 12 Earth Crystal, 8 Water Cluster, 4 Lightning Cluster and 1 other kind.

Every step is Alchemist work, from a Lv 50 intermediate up to the Lv 50 finish, so one class covers the whole chain.

1 of the 7 raw materials come out of the ground, and one of them is time-gated: Gold Sand (5:00). That window comes round once per Eorzean day, every 70 real-world minutes.

Of the intermediates, Terminus Putty has the widest use: 69 recipes call for it, spanning six of the eight crafting classes.