Cataclysm will ship with three raid instances ready to be played. There are a total of 13 new bosses including the secret heroic-only Sinestra encounter, so players should have plenty to do upon reaching level 85.

The Bastion of Twilight is located in the Twilight Highlands in the fortress of the Twilight's Hammer. The Twilight Citadel is a gigantic spire located on the border of Loch Modan and the Twilight Highlands and instance access can be gained through the portal high atop the spire.

Cataclysm Raid Instances.