The Incandescent Essence Helm Enchant is now available by completing The Power of Dreams quest! Here's all the role specific effects.
Amirdrassil, The Dream's Hope Raid Overview and Boss Strategies Loot Drops in Amirdrassil, The Dream's Hope
Gathering 50 Echoed Ephemera is now possible which means that Incandescent Essence can be acquired! This reusable helm enchant has different versions depending on your role: Tank, Ranged DPS, Melee DPS or Healer.
Tank Helm Enchant
Healer Helm Enchant
Ranged DPS Helm Enchant
Melee DPS Helm Enchant
Theorycrafters have discovered that Incandescent Essence scales with Item Level. Upgrade your helm to higher item level and your Helm Enchant effect will do more damage!
This has now been fixed.
Our Beast Mastery Hunter Guide Writer, Tarlo, has commented that Ranged Hunter specs don't get any procs as seen in this log. This is clearly a bug, but Hunters at the moment this effect is worth nothing to you.