WoW Achievements — Browse All Achievements
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Browse achievements from all expansions including The War Within, Midnight, Dragonflight, Shadowlands, and Classic. Find guides for Glory of the Raider, meta-achievements, PvP achievements, exploration, and more. Track your achievement points and completion progress via Battle.net.
Realm First! Obsidian Slayer
Participated in the realm first defeat of Sartharion the Onyx Guardian in 25-player mode.
Realm First! Obsidian Slayer is a one-time realm achievement earned by participating in the very first kill of Sartharion the Onyx Guardian in 25-player mode on your server, awarding the Obsidian Slayer title to every player present in the instance at the moment of the kill.
Enter The Obsidian Sanctum
Enter the 25-player version of The Obsidian Sanctum and defeat Sartharion the Onyx Guardian — every player inside the instance at the time of the kill receives the Obsidian Slayer title, while guild members not present do not receive it.
Be First On Your Realm
This achievement is only awarded for the single first kill of Sartharion the Onyx Guardian on your realm, so it must be completed before any other group on your server defeats him in 25-player mode.