Patch 7.3 adds new crafting materials for every professions, and if I remember correctly, this is the first time new base materials were added to the game this late and not just at the start of the expansion. You should expect that these will be really expensive at first.

These materials are:

• [Astral Glory]
• [Empyrium]
• [Fiendish Leather]
• [Lightweave Cloth].

I made farming guides for all of these new materials so check them out if you want to farm them. But keep in mind that most of these farming places will probably be pretty crowded, since everyone want these new materials

To make it easier to level professions to 800, most recipes will stay orange for 20 more points. This is a huge change! For example, the blacksmithing 780-800 part needed around 120 Demonsteel Bar and 60 Blood of Sargeras at minimum to craft 30 Waistguard. (you probably needed to craft 50 if you were unlucky). But now you will only need 20 Demonsteel Bar and 10 Blood of Sargeras to craft 5 of them.

The rank 2 recipes have the skill ranges that the rank 3 used to have, so if you are really unlucky with the rank 3 Alchemy recipes, now you can level Alchemy to 800 with just the rank 2. Or you can level inscription to 800 without waiting for the Darkmoon Faire.

It seems engineering helms are the only one that didn't change because the helms were already yellow up until 800, so engineering was already easier to level than the other professions. But now with this change you actually don't even have to make helms, because you can make the previous recipe up to 800.

General changes

• You can now upgrade your items with [Obliterum] 10 times instead of 8, allowing a max item level of 865.
• Increased drop rate of many 3-star recipes. Cooking recipes included.

Blacksmithing

Several old patterns and some new ones were added.

The biggest change in Patch 7.1 is the new Blood of Sargeras trainer, but we also get new recipes for a few professions. Illnea Bloodthorn in Dalaran now sells trade goods for [Blood of Sargeras].

List of items you can buy:

• 5 x [Felslate] for 1 Blood of Sargeras.
• 3 x [Starlight Rose] for 1 Blood of Sargeras.
• 3 x [Leylight Shard] for 1 Blood of Sargeras.
• 20 x [Unbroken Tooth] or 20 x [Unbroken Claw] for 1 Blood of Sargeras.
• All other items (herbs, ores, leather, meat, fish, dust) sold in lots of 10 for 1 Blood of Sargeras.
• You can also buy [Order Resources Cache] which is account bound so you can send order resources to your alts.

New profession recipes

You can now upgrade your items with [Obliterum] 8 times instead of 7, allowing a max item level of 855.

Alchemy

• New DPS potion: [Potion of Prolonged Power] - [Recipe: Potion of Prolonged Power] is a World Drop in the Broken Isles.