Sea Swallow Leather

Nothing in this list is craftable in turn, so one Sea Swallow Leather is a single step: 5 units of material drawn from 2 base items, plus 7 crystals.

That bill outweighs 4,201 of the 13,602 recipes tracked here and 489 of the 1,844 Leatherworker ones, and 9,374 recipes nest deeper.

1 of the 2 raw materials matches a gathering node, none of them timed; the other 1 comes from vendors, drops or content this site does not track.

Sea Swallow Leather is itself consumed by 124 further recipes, spanning six of the eight crafting classes.