This article concerns content exclusive to . Cataclysm
This article should only contain officially released content, such as beta and press release content.
This information is subject to change at any time. (Note this tag should only be placed on major Cataclysm articles,
until release.) See WW:DNP for the official policy on posting unreleased content. Bastion of Twilight is an entry-level raid instance introduced in . It features five bosses plus one optional heroic boss. World of Warcraft: Cataclysm 
The Bastion of Twilight, along with
Throne of the Four Winds and Blackwing Descent, is meant to be the "Naxxramas" of Cataclysm: an entry level raiding.  
The instance entrance is located on top of the
Twilight Citadel spire at in southwestern [34, 78] Twilight Highlands overlooking Loch Modan.
Several of the encounters have be announced so far; they are:
Upon defeating Cho'gall on heroic mode, the floor beneath players will collapse and they will fall into a cavern of flowing lava and
"a very large number of black [sic] dragon eggs" that hides a ". horrifying secret"   
25man.com Bastion of Twilight Tactics & Strategy Guide
Icy Veins Comprehensive encounter guides for Bastion of Twilight