Warforged Titan

The raid boss of the Twilight Forge quest series, encountered in The Titan Awakes quest.

Warforged Titan (CR 20)
 * True Neutral Construct
 * AC 35
 * DR 10/Adamantine
 * 8,000 hp (Technically around 10x more - But for much of it he is invulnerable, and the damage is done by the laser)
 * BAB fairly low, around 40 suspected on elite
 * Titan shield - immunity to all non-trap damage when between 88% and 12% hp.
 * Titan missile (force damage)
 * Knockdown - affects whole raid, hidden DC 35 Balance roll to stay standing. May launch characters north, east, west, or south, but not diagonally.