Burning Crusade Timewalking event Sept 30th through Oct 5th.

This week you have the following dungeons to Timewalk, assuming you are level 71 or higher.

1. The Arcatraz
2. Black Morass
3. Mana-Tombs
4. The Shattered Halls
5. The Slave Pens

Changes this time include a Seal of Inevitable Fate in addition to the Iron Fleet Treasure chest from the weekly quest.

Read more about it here:
http://us.battle.net/wow/en/blog/199...ct-5-9-30-2015

slave pens and arcatraz is alot more annoying without cleansing totem :(