- Guild Name: Obsidium
- Server: Frostmane US
- Faction: Horde
- Website: www.obsidium-guild.net
- IRC Channel: none
They have three bosses down in Hyjal almost four and 3 bosses down in Black Temple. They raid Sunday-Thursday 7pm EST to 11:30pm EST, Friday and Saturday off. Anyone interested in joining just fill out an app on their website.
In the fall of 2007 they changed their name to Obsidium because TRx sounded stupid. Cleared Hyjal and BT. They still raid Sunday-Thursday 6pm CST to 10:30pm CST.
- Karazhan - Nightbane
- Gruul's Lair - Gruul
- Magtheridon's Lair - Magtheridon
- Serpentshire Cavern - Lady Vashj
- Tempest Keep - Kael'thas Sunstrider
- Mount Hyjal - Archimonde
- Black Temple - Illidan