After killing Emberstrife and getting our guild's first UBRS key an entire raid of people wanting to complete their Onyxia Attunement an hour before their raidtime showed up. : r/classicwow
Upper Blackrock Spire (UBRS) Dungeon Strategy Guide - WoW Classic Season of Mastery - Wowhead
Esfand on Twitter: "CLARIFICATION FROM BLIZZARD ABOUT THE UBRS QUESTION. Loot Trading will only be in effect for content with a raid lockout. This means: Molten Core Onyxia Blackwing Lair Zul'Gurub AQ20
Upper Blackrock Spire (UBRS) Dungeon Strategy Guide - WoW Classic Season of Mastery - Wowhead