here's what you had to do before fighting Onyxia, the first raid boss in vanilla. nowadays to do a raid you can just press a button and wait a few minutes and
General Drakkisath's Demise - Quest - World of Warcraft
60] Jame's Upper Blackrock Spire Guide (UBRS) - Wow pro
Acronym/Slang Guide for Vanilla World of Warcraft / WoW Classic - VanillaGuides