One Light in the Darkness (25 player)
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|  One Light in the Darkness (25 player)
| 10 
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| Defeat Yogg-Saron with the assistance of one or fewer Keepers in 25-player mode. | |||
Criteria:
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Heroic: One Lights in the Darkness is a achievement gained by defeating 
Yogg-Saron in the Heroic Difficulty with one or zero Keepers of Ulduar helping.
