Delver's Call: The Underkeep

Quest is picked up via a book at the Start of the Delve.

List of all Delver's Call quests, which can be completed at will:

* Delver's Call: Fungal Folly
* Delver's Call: Kriegval's Rest
* Delver's Call: Earthcrawl Mines
* Delver's Call: The Waterworks
* Delver's Call: Dread Pit
* Delver's Call: Nightfall Sanctum
* Delver's Call: Mycomancer Cavern
* Delver's Call: The Sinkhole
* Delver's Call: The Skittering Breach
* Delver's Call: The Underkeep
* Delver's Call: Tak-Rethan Abyss
* Delver's Call: Spiral Weave (yes, there's two different quest IDs depending on where you pick it up)
* Delver's Call: Spiral Weave

Script to check which Delver's Call quests you've done:

/run for _,i in ipairs({758;759;2648;2649;766;2664;769;767;768;2667;771;770;2666}) do i=i+83000 print(format("%s (%d): %s",C_QuestLog.GetTitleForQuestID(i),i,C_QuestLog.IsQuestFlaggedCompleted(i) and "\124cff00ff00Yes\124r" or "\124cffff0000No\124r")) end


There's also a few quests as part of the "Zekvir" storyline, which are sequential and require campaign progress:

Delve into the Earth

Requires completing [achievement=20118] campaign through The Fourth Seat.

Delves: The Waterworks

Delves: Nightfall Sanctum

Requires completing [achievement=20598] campaign through [quest=78607].

Delves: The Underkeep

Requires completing [achievement=19559] campaign through The General's Consensus.

Script to check which Zekvir quests you've done:

/run for _,i in ipairs({78464;83749;83755;83761}) do print(format("%s (%d): %s",C_QuestLog.GetTitleForQuestID(i),i,C_QuestLog.IsQuestFlaggedCompleted(i) and "\124cff00ff00Yes\124r" or "\124cffff0000No\124r")) end


List of all Delver's Call quests, which can be completed at will:

* Delver's Call: Fungal Folly
* Delver's Call: Kriegval's Rest
* Delver's Call: Earthcrawl Mines
* Delver's Call: The Waterworks
* Delver's Call: Dread Pit
* Delver's Call: Nightfall Sanctum
* Delver's Call: Mycomancer Cavern
* Delver's Call: The Sinkhole
* Delver's Call: The Skittering Breach
* Delver's Call: The Underkeep
* Delver's Call: Tak-Rethan Abyss
* Delver's Call: Spiral Weave
* Delver's Call: Spiral Weave

Here's a longer script that actually works for people like me who don't know how to make the other script comments work:
/run print(C_QuestLog.IsQuestFlaggedCompleted(83758), ",Fungal Folly")
/run print(C_QuestLog.IsQuestFlaggedCompleted(83759), ",Kriegval's Rest")
/run print(C_QuestLog.IsQuestFlaggedCompleted(85648), ",Earthcrawl Mines")
/run print(C_QuestLog.IsQuestFlaggedCompleted(83766), ",Dread Pit")
/run print(C_QuestLog.IsQuestFlaggedCompleted(85649), ",Waterworks")
/run print(C_QuestLog.IsQuestFlaggedCompleted(85664), ",Nightfall Sanctum")
/run print(C_QuestLog.IsQuestFlaggedCompleted(83769), ",Myomancer Cavern")
/run print(C_QuestLog.IsQuestFlaggedCompleted(83767), ",Sinkhole")
/run print(C_QuestLog.IsQuestFlaggedCompleted(83768), ",Skittering Breach")
/run print(C_QuestLog.IsQuestFlaggedCompleted(85667), ",Underkeep")
/run print(C_QuestLog.IsQuestFlaggedCompleted(83771), ",Tak-Rethan")
/run print(C_QuestLog.IsQuestFlaggedCompleted(83770), ",Spiral Weave")
/run print(C_QuestLog.IsQuestFlaggedCompleted(85666), ",Spiral Weave")