The Realm of Terror is a Torment difficulty secret area accessible by using the Infernal Machine of Terror in the Heretic's Abode.
▪ In New Tristram, enter the Heretic's Abode.
▪ In the Abode, use an Infernal Machine of Terror to open a portal to The Realm of Terror.
▪ Shadow of Diablo
▪ The Savage Behemoth
▪ The Undying One
▪ Shadow Clone