By and large, your failures in Torghast are measured in deaths, not with a timer. Dying repeatedly alerts the Tarragrue, a lumbering iron-clad creature that will appear at the level’s entrance and slowly move toward its end. If he sees any heroes, he will chase down and kill them. If he reaches the end of the level or kills all the players in the level, your run ends and you are thrown out of Torghast.
Furthermore, upon the Lich King's death he even spoke of "Seeing only darkness before him" while Sylvanas Windrunner said the same in Silverpine Forest after being risen from the dead by the Val'kyr. This may hint that because undead, death knights, and necromancers are connected to the Realm of Shadows when they die (again) they actually become apart of the Realm of Shadows and are forced to wanders in its dark mists for the rest of eternity. If this is so, then it can also be implied that when a death knight is given his/her own personal runeblade, the runeblade is actually used to bind the individual to the Realm of Shadows in mind and body, making it impossible to ever be rid of the death knight curse. In Howling Fjord, players are even able to witness the Lich King himself standing within the Realm of Shadows with two Val'kyr. The idea that necromantic magic and death knight runes drawing power from the Realm of Shadows itself is not yet proven, but it is heavily supported by in-game quests and lore.
A new army of the dead rises: to combat Sylvanas' assault on Icecrown, Bolvar Fordragon— the revered former paladin who took on the mantle of Lich King to keep the Scourge at bay—has raised heroes from among all the peoples of Azeroth to bolster the Death Knights of Acherus. With Shadowlands, pandaren and all allied races will now be able to become death knights.
Anima Powers grant you the incredible strength needed to take on the Jailer’s more challenging allies. They will often directly improve one of your Covenant class or signature abilities, modifying it with powerful properties for you to wield. Anima Powers can be found hidden in corners, tucked away in phylacteries, or carried on the bodies of the Jailer’s servitors. Keep an eye out for powers that interact with one another in interesting ways!
Shadowy Tormentors inhabit this dimension, and emerge from it to torment death knights such as Koltira Deathweaver. The Lich King originally kept them at bay, but after the Knights of the Ebon Blade left his service, the tormentors are now loose upon them. He even appears in the World of the Dead, as he calls it, riding a frost wyrm during  The Power to Destroy.
When the time comes to ally with one of these four, you’ll want to carefully consider the abilities the Covenant will provide you. Each provides two abilities tailored to the theme of the Covenant. The first of these is the Covenant’s signature ability, which is available to all Covenant members regardless of class, race, or specialization. This ability helps you explore and engage with the world in new ways, and gives you a unique tool to help solve the problems you encounter in the Shadowlands. The second of these abilities is specific to your class, and gives you a new spell or power to use in combat.
The origins of the Shadowlands remain uncertain, but they have existed ever since mortal life first arose in the physical universe. They span all worlds, including Azeroth, on which Icecrown serves as an anchor to the Shadowlands. There are those who believe mortal souls are drawn into this dark place when they die, remaining there forever. Others hope their souls will go on to a brighter place rather than languish for eternity within the cold confines of the Shadowlands.