Both Team Coal and Team Pink have been regularly downing Sartharian in the Obsidian Sanctum, a 10-person raid instance. What you probably don't realize is that both teams have now also downed Sartharian with one drake still standing. Team Pink achieved that for the first time March 23rd, while Team Coal beat them to it in February. What neither two has yet to succeed at (as far as I know) is downing Sartharian with more than one drake up. Keep your eyes peeled for more exciting Sartharian news!