Artisan's Mettle and Spark of Ingenuity Guide for The War Within

The Spark of Omens is a rare reagent that serves as a time gate to Season 1 combat crafting gear in The War Within. You can get them by doing one of the open-world weekly quests given at the center of Dornogal.

By default, items created with the Spark can go up to 584 item level, but you can add the optional reagents Enchanted Runed Harbinger Crest or Enchanted Gilded Harbinger Crest, crafted with Enchanting, in order to make them go up to 619 or 636 item level at maximum quality!

There is also Enchanted Weathered Harbinger Crest, which can be used on basic gear crafts such as Malleable Band without a spark in order to get the gear to up to 590 item level.

To summarize:

Crest	Enchanted Crest	Source	Item Level Range
Weathered Harbinger Crest	Enchanted Weathered Harbinger Crest	LFR Awakened Raids and World Content	577 to 590
No Crest	Spark of Omens alone	Weekly Dornogal emissary world quest	584 to 597
Runed Harbinger Crest	Enchanted Runed Harbinger Crest	Heroic Awakened Raids, M+ from 4 to 8	606 to 619
Gilded Harbinger Crest	Enchanted Gilded Harbinger Crest	Mythic Awakened Raids, M+ 9 or higher	623 to 636

Spark of Omens, while rare, are easy to obtain. You will be able to create one right away in the first week from the starter quests and can obtain another one every other week from there on, allowing you to have a new spark ready for crafting every other week!

Artisan's Acuity is a rare reagent used for Recrafting and for high-end profession crafts, most notably in the profession best in slot gear crafts, which require over 200 Acuity per craft!

If you are a crafter, you can get some from Patron NPC work orders, with the rest being obtained from gaining Profession Knowledge points (5 Acuity per point gained) and First Craft bonuses, which are awarded every time you craft an item you have never crafted before.