The short and unhelpful answer to the question Who is the Jailer is that guy up there at the head of the post -- Game Director Ion Hazzikostas confirmed on his live interview with Zoltan.tv that the folks at Wowhead had successfully datamined the fella's model, and that up above is it.
Death loas and dead people trying to kill them: A guide to the characters of Shadowlands prequel novel Shadows Rising
So, in case you missed it, Blizzard is releasing another prequel novel that will tie the World of Warcraft expansion Battle for Azeroth into Shadowlands the way Before The Storm tied Legion into Battle for Azeroth.
Battle for Azeroth has certainly not been all things to all people.
First up, in this Know Your Lore I'll say that I generally think that Shadowlands looks amazing.
I mean, we know what the Helm of Domination is.
At BlizzCon 2019 we got the show-stopping announcement we've been waiting for: World of Warcraft's eighth expansion will be Shadowlands.
When you write about Blizzard, it's hard to resist the siren song of "next expansion leaks" that start popping up every year a few months before BlizzCon -- especially on those extremely rare times when you read a leak and it sounds legit to you.
The folks at Wowhead have been doing their datamining magic on the patch 8.3 PTR, and some things they've found may not be intended to go live for patch 8.3 at all.
Calia Menethil is a major lore figure in Warcraft, and she featured heavily Before the Storm, the novel that served as a bridge between the end of Legion and the beginning of Battle for Azeroth.
Anduin Wrynn has not actually taken an action since Lordaeron.