Life-Bound is L70 Epic Leather gear, i382-i392 for Q1-Q5, created by Leatherworkers via the Dragonflight Craft Order station. It requires Leather Armor Crafting specialisation to unlock patterns and optional reagents.
Primal Infusion - upgrade to i395-405, +30 Difficulty. Must be supplied by Buyer
or Concentrated Primal Infusion - upgrade to i408-418, +50 difficulty. Must be supplied by Buyer
Embellishments such as Toxified Armor Patch (from LW, increases effects of Decayed gear by 100%) or Armor Spikes (from BS, chance to cause damage when struck by Melee) - +35/30/25 difficulty
Draconic Missive of the Fireflash etc - specify the stats, +25/20//15 recipe difficulty
Illustrious Insight - can increase craft quality, -30 difficulty
1 Spark of Ingenuity (BoP - Buyer supplies),
40 Primal Chaos (BoP - Buyer supplies),
4 Crystalspine Fur (skinning/AH),
13 Frostbite Scales (LW/AH),
150 Resilient Leather (skinning/AH)
* I don't have this unlocked yet so am unable to see what these are. May be similar to those for the Mail equivalent e.g.