Just like the previous Raids, and Skolas (to some degree), the Elemental Primaries did not drop until you played through on Hard Mode. That being said, I was also toying with this same idea earlier today. But I had a different "recipe". First of all, my method only allows this to be done to Legendary Weapons, and requires the use of a Legendary Weapon with the Burn Type you want, and an Etheric Light. Additionally, once done. It's done. Just like when you used Etheric Light to upgrade your pre-HoW gear. The "Infuse Burn" disappears. So you best be certain which burn you want to apply to your weapon. So for example let's say you have a Legendary Pulse Rifle and you want to infuse Void burn into it. Here's how the recipe would look. [spoiler] [b]Kinetic Legendary Pulse Rifle[/b] - Legendary Primary Weapon with Void Burn (Exotic weapons cannot be used) - Etheric Light - Legendary Marks - Glimmer [/spoiler] All this would do is add the Void Burn to the weapon. It would not increase the weapon damage if the weapon being fused was a higher base damage. That is a choice the player would have to make. Do I use this Void Legendary Primary Weapon for base damage or to infuse Void Burn into a different weapon? And again, once the choice was done on a weapon, the "Infuse Burn" option would disappear. And this "Infuse Burn" option is NOT available for Exotics. Not to [i][u]give[/u][/i] nor [i][u]take[/u][/i] the burn from them. Additionally this could potentially breathe new or restored life into PoE beyond "coin farming" as it requires Etheric Light as part of the recipe.