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Orbital Bombardment (10 player)
Defeat Flame Leviathan with at least 1 Orbital Defense System active in 10-player mode.
Orbital Bombardment (10 player) is earned by defeating Flame Leviathan in 10-player mode with at least one Orbital Defense System active, which is the first tier of hard mode in Ulduar.
Activate Hard Mode First
Before starting the gauntlet, speak to the Lore Keeper of Norgannon (the large black golem in the area before Flame Leviathan) to activate hard mode. Do NOT talk to Brann first — talking to Brann skips hard mode activation entirely, even if towers are left standing.
Leave At Least One Tower
During the gauntlet leading to Flame Leviathan, leave at least one of the four defense towers intact. The towers are not directly targetable but display a health bar beneath their nametag when moused over, which helps you track whether they are still standing.
Defeat Flame Leviathan
Enter Ulduar and defeat Flame Leviathan while one Orbital Defense System remains active. With one tower up, the Leviathan gains 40% additional health, so be prepared for a longer fight than the standard encounter.