Only hours after Blizzard made additional changes to the C'thun encounter, European guild Nihilum (Magtheridon realm) seems to have managed to kill C'thun.   Forum post with details here, and screenshots and loot are listed on their website.  Congrats, members of Nihilum for this impressive world first!

[Thanks, spencer, for the quick heads-up on this one!]

This article was originally published on WoW Insider.

Additional Ahn'Qiraj Tweaks