So, you could take down up to 3 guardians, but never all 4 or the event would start?

I'd be pissed too, but I do like the idea of having something unique. It seems like in current games ( I suppose even RL ), everyone feels entitled to the same, or better, then the next guy.

I suppose, in WoW terms, this could be interperpeted and having only 1-2 Thunderfury's per server. The AQ opening event mount is the only really unique thing in WoW as most servers only have 1-4 of them. It seems in 'endgame' sooner or later, everybody becomes clones of one another.