Normally when I'm in Obsidium Sanctum, I'm the OT, the 'add picker upper' - given that I'm unholy and usually less well geared than the other tanks in the instance.
This time, I was given the daunting task of tanking Sartherion. Not sure if the RL did that because of my magic shield eating a few of his flame breaths, or because he wanted the better geared and more knowledgeable of the tanks on the drake and adds, or what, but there it was.
I wiped the first time on a flame tsunami. See, I didn't know that you had to dance between the two safe spots, and I thought there was just the one spot that was safe from all the flames. I am sometimes... not often, but sometimes... dumb.
So the first time, I went to what I was told was the 'safe spot', not realizing there was a second, and sure enough, the first flame tsunami was right on my back.
The next time, I went ahead and stood in the safe spot that doesn't require me to move from the flame tsunami that arrives from my back, so I just had to dance in and out of one tsunami.
I did die on our successful attempt, as neither I, nor my healer, were prepared for (or knew about!) the mini-enrage Sarth gets when you down one of the drakes. So BAM. Dead tank. Thankfully, the other tank was up to the task of picking up Sarth and the DPS were up to the task.
In the future, gonna try to save a bone shield cooldown for that time and be ready with trinket/other cooldowns. As it was, I went from reasonably alive, to dead, before I realized what happened.
So I can finally say that I've tanked Sarth. Go me!
After that, I went and pitifully DPS'd in Heroic OK. I need badges as Keiji for the Tier Chest. On the herald? Yeah. I slapped on my tank set and actually didn't do too badly in terms of killing my friends.