When players start to catch on, that you have an UBRS key!* : r/classicwow
Classic WoW - Upper Blackrock Spire Guide (UBRS)
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