Lightning Steel Ingot

In case someone did not post this before, you don't need to stay in the actual lightning forge to make this item. Any anvil works.

However, making the remake of TBC weapons requires thunder forge, even though tooltip does not indicate that.

The list regarding the learnt recipes is currently wrong here.

You will learn the 522 items and the 458 pvp items by creating this ingot.

After creating 5 Ingots you can build one of the 463 reborn Weapons to learn the 476 version and after 10 more Ingots you will learn the 502 Version(The final form) that requires 15 Ingots

Few things to note about this new Blacksmithing spell.

• 
  
• It currently does not specify any 1 day cooldown, like you get from Living Steel. However, I expect it will have a 1 day cooldown when it hits live so it comes in line with the other professions. This has a 1 day cooldown that makes it into another daily-transmute or daily-gem craft as you see in Alchemy and Jewelcrafting, and now Leatherworking and Tailoring too.
• 
  
• It doesn't mention that it is limited to the current expansion's Blacksmithing plans, nor does it mention anything about raid-only dropped plans. I fully expect this to discover all plans available in game, preferring higher level over the lower level plans first. This could put excessive value into the profession for some people who get lucky, which I believe is the way the devs wanted this to go. EDIT: seems to be prioritising the new crafted PVP gear for now.
• 
  
• The operative word here is "may". This is what further reinforces my expectations that this will have a cooldown - or a phenomenally low chance on no cooldown (a.k.a. a money sink) Certainly has a cooldown and seems to be a guarantee to discover a recipe.
• 
  
• The recipe for this spell (from [item=94721]) seems to have been hotfixed so that players can't aggro [npc=69461] any more (thanks to minikeg654's comment for the info).
• 
  

Obviously this is just speculation and we'll know more when it hits Live servers has had more time.

EDIT (for live): As with the other profession changes, most people are reporting that they are learning PVP gear recipes for the moment and we should start to expect other patterns as soon as that becomes less of an option for this spell to choose from.