Theralion and Valiona make up the second boss encounter in Bastion of Twilight. The two dragons seem to be brother and sister. It should be noted that this is the same Valiona that is encountered in Grim Batol, where she abandons Drahga Shadowburner, leaving him to die within the dungeon while she escapes. It should also be noted that Valiona is the consort of Deathwing's son, Nefarian.[citation needed]