Bastion of Twilight

Bastion of Twilight is a new entry-level raid instance that came with World of Warcraft: Cataclysm. It features four bosses plus one optional heroic boss.

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 experience.

The instance entrance is located on top of the Twilight Citadel in southwestern Twilight Highlands overlooking Loch Modan.

Geography
Despite the entrance portal being atop a tall spire, the Bastion of Twilight seemingly takes place deep underground, with lava seen in several places, and goes deeper and deeper as one progresses. It has a traditional, linear raid design.

After some initial trash in the Bastion Antechamber, one finds Halfus Wyrmbreaker and his Proto-Behemoth keeping watch over several enslaved dragons in the Wyrmbreaker's Rookery. A long hallway filled with Twilight's Hammer cultists stands between here and the Twilight Enclave, home to the the twilight dragons Valiona and Theralion.

Further down one finds the elemental ascendants under Cho'gall's leadership. Here, in the Sanctum of the Ascended, resides the Ascendant Council, which consists of representatives of fire, earth, water, and wind. Those adventurers brave enough to survive this encounter may challenge Cho'gall himself in the Throne of the Apocalypse.

Yet it seems there is more going on than meets the eye. After defeating Cho'gall on heroic mode, the floor drops out to reveal the massive Twilight Caverns, home to Lady Sinestra, consort of Deathwing. She is surrounded by twilight eggs and is sure to be one of the toughest encounters adventurers have yet faced.

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