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
Classic WoW Raid Attunements Guide - a Key to Best Places in Vanilla | MMO Auctions
Seal of Ascension Guide (UBRS KEY) | WoW Classic 1.13 Guide - YouTube
Classic WoW Raid Attunements Guide - a Key to Best Places in Vanilla | MMO Auctions