Defeat Algalon the Observer in 10-player mode without anyone in the raid wearing any equipment with an item level higher than is available in 10-player Ulduar
Herald of the Titans is the achievement in Ulduar 10-player. Requires killing Algalon the Observer by using the equip with the maximum item level 226, or 232 weapons. This included:
All loot from Ulduar 10-player, including loot from hard-modes and from Yogg-Saron.