Research: Ethereal Ink

With Legion changes. This only teaches these following glyphs:

• 
  
• [spell=148276]
• 
  
• Glyph of Felguard
• 
  

Nothing more, nothing less.

As of the way things currently are in BfA Inscription (it's Oct. 12th, 2018), I came to Shattrath to learn Outland Inscription from one of the bookcases in the Scryer's Library as a newer character who has not swayed my faction either way with the Aldor or Scryers.

The teaches tab here on Wowhead for Research: Ethereal Ink is actually incorrect as I just now researched 2 glyphs:

Glyph of the Sha for Priest
Glyph of the Felguard for Warlock

Outland Inscription seems to work a little differently from "Classic" Inscription 1-300, but I'll put the rest of this commentary on the actual page for that.

How is Research: Ethereal Ink learned in BoA Pre-Patch ? I have trained Outland Inscription to 30/75 and have not Discovered this skill. The trainer in Shattrath [npc=33679] does not offer it. So it seems the only way I can reach 75 Outland Inscription is to make a bunch off [item=43667] or [item=43666]--both very expensive.

Odd that my skill book shows 40/75 in Outland Inscription, but [npc=33679] shows 75/75. I'm gonna move on I guess.