What actually is the Empty Hold? Where did it come from? Why is it empty?
This is the list of Tiles associated with it, copied from the Wiki:
- Empty Throne, the throne that knew no King
- Wanderer Knight
- Mistress, who waited still, alone in her bed of dreams
- Watcher, who witnessed all
- Walker, who patrolled borders not even he could see
- Saviour - Brys Beddict, whose outstretched hand was never grasped
- Betrayer - The Errant, whose loving embrace destroyed all it touched
Note: I am not entirely sure about Saviour and Betrayer. Those seem more like temporary roles than like actual postions in the Hold (The Errant is also one of the Fulcra). But that's debatable,
We also know about the Empty Hold:
- It can be used as a weapon, and that looks like white lightning, bright light and fire. It burns everything it touches to ashes. It can also be used for more subtle purposes, but I don't think we see much of that as pretty much all the sorcerers get slaughtered real fast.
- It only exists in the 'preserved area', in and around Lether. It is an ancient Hold.
- It is not the Hold of Ice, Beast, Azath, Dragon or Fulcra (Fulcra appears to be ancient presences - Eres, Kilmandaros, Knuckles - and shapeshifters, likely a later addition due to the First Empire Ritual).
- It is also not the Hold of Death, as that one is explicitly absent. (Something to do with the War on Death?)
I can only draw one conclusion from all this: the Empty Hold is the Hold of Fire, also known as Tellan. That's the one missing from the list. That was definitely still a hold when Gothos did his ritual. It became Empty soon after, when the Imass did their ritual. Because of Gothos' ritual a fossilized version of Tellan remained in that area. Tellan never had a king. No one can sit its throne now - or this could even refer to Shadowthrone (not) taking that throne. The lonely dreaming mistress is Burn - who is very much MIA among the Tiles. And we know she dates from before Gothos' ritual. Wanderer, Watcher and Walker could be characters from FoD too, hard to say, but plenty that could fit the role. (Edgewalker is a strong candidate for Walker, as he is now in Shadow wich likely bordered Tellan before the Tellan Ritual. Also, his name. Arathan I can see become the Wanderer Knight. Or it could be Kilava, maybe even Tool. Or many, many others. Same for Watcher; lots of witnessing in these books... Saviour/betrayer could in other contexts be Silverfox & Itkovian.)
This also might explain what happened to those Imass in the Refugium. They arrived on Lether and found Tellan instead of T'lan, and that allowed them to become sort of alive again and lost in memories. It is actually stated that in the Refugium 'The ritual of Tellann never happened'.