$TeleportFailure_DelveEnd_ObjectiveCompletion
Complete all delve objectives to unlock boss teleport.

$TeleportFailure_DelveEnd_Other
Unable to send player to boss room.

$TeleportFailure_DelveStart_ObjectiveCompletion
Delve objectives have been completed, no need to return to depth start.

$TeleportFailure_DelveStart_Other
Unable to send player to start of depth.