Hour of Twilight is a dungeon whose entrance is located in Tanaris in the World of Warcraft game. The minimum level for this dungeon is 85. The instance was released in the Cataclysm expansion. The dungeon contains 3 bosses. The end boss of Hour of Twilight is Archbishop Benedictus.
Hour of Twilight is the third in a series of dungeons that players will undertake that was released at the same time as Dragon Soul raid instance. The other two are End Time and Well of Eternity. In this instance, the adventure setting is Northrend where Archbishop Benedictus is waiting for the arrival of an artifact that you have but he will betray you and you need to kill him for that.
When you arrive, you need to talk to Thrall to start the instance. This applies to both Alliance and Horde. You cannot progress without talking to Thrall. The dungeon takes "place" in Dragonblight.
Have to admit, it has one of the worst voices in the game. Given how many characters that are in the game, it had to eventually come down to this with a heavy breathing voice. Apart from the accent, there's nothing bad about this boss. He'll create spots on the ground which he'll target with spells and create a few adds but there's nothing really to it. An easy boss. After the boss, remember to talk to Thrall and then mount up to follow him to the next area. Do not engage the giant worms, there's no need.
You have to clear the trash to start this encounter. Just talk to Thrall to start and then kill all the trash. Thrall will not skip the trash, he'll go to everyone and kill them. Asira is a Blood Elf rogue so you can expect poisons and mild AOE damage. Stay close to Thrall for help. When Asira throws a smoke bomb, you need to move out of the way other it will cause damage to you. If she throws a knife at you, you'll be damaged and stunned for a short amount of time. After the fight, climb onto a red drake for the next location.
You can simply skip all the trash here, you need to talk to Thrall to start the encounter and the trash run. If you run all the way down, it'll be clear but Benedictus won't appear and you'll have to run back again.
When you have progressed down to the bottom, Ben to his friends will come out and meet you and help you out. Inside the Wyrmrest Tower, everything changes and he'll reveal himself to be an agent of the Old Gods. After a short speech, the battle will start. He'll use light as his main weapon. He'll create areas of light which will burn the player(s). You also need to be aware of the light wall that crosses the fight area, for this, you need to move to the very edge of the fight area.