According to progression site GuildOx, the Alliance guild We Know Girls on Arygos-US has earned the world-first Champion of Ulduar achievement. This achievement is awarded for completing each 10-man boss fight (except Alagon) with no raid members dying during that boss fight. It's the Ulduar version of The Undying, but unlike Undying, it doesn't have to be done all at once - if I down Flame Leviathan with no deaths and then wipe on XT-002, I still get achievement credit for the Flamey kill.

I think this is a good reworking of the achievement. I've heard a lot of horror stories about flawless Undying/Immortal runs ruined by a disconnect or a lag spike. With the Ulduar achievements, at least bad luck will only bork that one boss. And congratulations to We Know Girls!

Update: As pointed out below, VoS on the Sargeras realm and Bastion of Uldaman got the achievement May 9th, last Saturday, which means We Know Girls was not the world-first (due to the Armory's erratic updates giving GuildOx the We Know Girls information first). Grats to VoS and Bastion. Anyone know of any earlier than May 9?

Update #2: GuildOx now properly reflects the order that these guilds achieved Champion of Ulduar.

This article was originally published on WoW Insider.

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