Progression - Previous Expansions

Warlords of Draenor
Hellfire Citadel (Heroic)
Archimonde - 12/02/2015
Mannoroth - 11/10/2015
Tyrant Velhari - 11/4/2015
Shadow-Lord Iskar - 11/3/2015
Xhul'horac - 10/27/2015
Fel Lord Zakuun - 10/14/2015
Socrethar the Eternal - 10/13/2015
Gorefiend - 9/8/2015
Kilrogg Deadeye - 9/1/2015
Hellfire High Council - 9/1/2015
Kormrok - 9/1/2015
Iron Reaver - 9/1/2015
Hellfire Assault - 8/12/2015

Blackrock Foundry (Heroic)
Blackhand - 4/29/2015
The Blast Furnace - 3/30/2015
The Iron Maidens - 3/16/2015
Kromog - 3/3/2015
Oregorger - 3/2/2015
Flamebender Ka'graz - 2/25/2015
Operator Thogar - 2/25/2015
Beastlord Darmac - 2/23/2015
Hans'gar and Franzok - 2/18/2015
Gruul - 2/11/2015

Highmaul (Heroic)
Imperator Mar'gok - 1/20/2015
Ko'ragh - 1/12/2015
Brackenspore - 12/30/2014
The Butcher - 12/29/2014
Tectus - 12/23/2014
Twin Ogron - 12/15/2014
Kargath Bladefist - 12/3/2014

Mists of Pandaria
Siege of Orgrimmar
[H] Galakras - 03/02/2014
[H] Sha of Pride - 02/23/2014
[H] Norushen - 02/09/2014
[H] Forgotten Protectors - 02/04/2014
[H] Immerseus - 01/28/2014
Garrosh Hellscream - 01/19/2014
Raiding break ends - 01/06/2014
Raiding break starts - 12/24/2013
Paragons of the Klaxxi - 10/20/2013
Siegecrafter Blackfuse - 10/20/2013
Thok the Bloodthirsty - 10/15/2013
Spoils of Pandaria - 10/07/2013
Malkorok - 09/30/2013
General Nazgrim -0 9/30/2013
Kor'kron Dark Shaman - 09/29/2013
Iron Juggernaut - 09/23/2013
Galakras - 09/22/2013
Sha of Pride -0 9/15/2013
Norushen - 09/10/2013
Forgotten Protectors - 09/10/2013
Immerseus - 09/10/2013

Throne of Thunder
[H] Ji-Kun - 08/27/2013
[H] Jin'rokh the Breaker - 08/26/2013
Lei Shen - 07/18/2013
Twin Consorts - 07/16/2013
Iron Qon - 07/16/2013
Dark Animus - 05/28/2013
Primordius - 05/28/2013
Durumu the Forgotten - 05/21/2013
Ji-Kun - 04/23/2013
Megaera - 04/22/2013
Tortos - 04/16/2013
Council of Elders - 04/8/2016
Horridon - 03/19/2016 (Pre 10-Man Nerf)
Jin'rokh the Breaker - 3/06/2013

Burning Crusade
Sunwell Plateau
Kalecgos - 08/10/2008

Black Temple
Illidan Stormrage - 06/01/2008
Illidari Council - 04/20/2008
Mother Shahraz - 04/15/2008
Reliquary of Souls - 04/07/2008
Gurtogg Bloodboil - 03/31/2008
Teron Gorefiend - 01/27/2008
Shade of Akama - 01/21/2008
Supremus - 01/21/2008
High Warlord Najentus - 1/20/2008

Hyjal Summit
Archimonde - 04/06/2008
Azgalor - 01/28/2008
Anetheron - 01/14/2008
Kaz'rogal - 01/14/2008
Rage Winterchill - 01/13/2008

The Eye
Kael'thas Sunstrider - 01/06/2008
Astromancer Solarian - 10/14/2007
Al'ar: - 10/12/2007
Void Reaver - 06/25/2007

Serpentshrine Cavern
Lady Vashj - 11/18/20/07
Leotheras the Blind - 10/05/2007
Fathom-Lord Karathress - 09/03/2007
Morogrim Tidewalker - 08/27/2007
Hydross the Unstable - 08/05/2007
The Lurker Below - 07/08/2007

World Bosses
Doom Lord Kazzak - 06/03/2007
Doomwalker - 05/28/2007

Magtheridon's Lair
Magtheridon - 06/11/2007

Gruul's Lair
Gruul the Dragonkiller - 05/07/2007
High King Maulgar - 04/02/2007

Karazhan
Netherspite - 05/18/2007
Nightbane - 05/10/2007
Prince Malchezaar - 04/06/2007
Shade of Aran - 03/18/2007
Terestian Illhoof - 04/05/2007
Chess Event - 03/16/2007
The Curator - 03/16/2007
Opera Event - 03/16/2007
Maiden of Virtue - 03/15/2007
Moroes - 03/15/2007
Attumen the Huntsman - 03/15/2007
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