It was only hard because you need multiple tanks that were geared. It wasn't a complex fight. Stealing tanks from other guilds... I've never killed this boss in vanilla and I'm not counting the part where a gm came to "help" us. That doesn't count as a kill. I miss the old days where's gm would pop up. Even in bc gm came when I was tanking prince and I "fell through" and hit prince until he died LOL
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I'm not sure about the 8 tank strat either. Never did that. But I agree with above poster. A lot of people never experienced naxx back in the day.