Eternal Crystal

These are the new reagents for enchanting. These are obtained by disenchanting epic-grade Shadowlands gear.

The 3 new reagents for enchanting are:

Eternal Crystal - Disenchanting epic-gear
Sacred Shard - Disenchanting rare-gear
Soul Dust - Disenchanting common or rare gear

As the comment below me writes, you're currently able to buy epic gear for Anima in your covenant after completing chapter 7, which requires renown rank 17, for only 100 [currency=1813]. Hotfixed as of 4th of January, 2021

The Eternal Crystal can also be obtained from the mission board when [item=184631] is up as a reward (Wowhead claims a drop rate of 85% currently) from the following 3 missions:

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• [mission=2180]
• 
  
• [mission=2181]
• 
  
• [mission=2170]
• 
  

You are currently not able to combine shards to create an eternal crystal on live servers at the moment, but this may be added in a future patch.

Considering how rare these are, it's really not a good game design choice to have these be necessary to even level Enchanting up in the first place.

Dropped by Baedos, the rare in bastion located at 51, 40.

Note: you don't actually kill him, but when he gets to 30% health or so, he goes back down to his normal size and spits out a treasure chest that contains this, among other things.