Nightbane

[NotSoDarklord]

Should have remembered this, but Defenders in heroic Slave Pens do hit for that much too. And of course, the Felguards are particularly nasty.

There're heroic Bog Overlords at the end of Underbog that can two-shot your tank in an instant too - they do a 7.5k knockback or so, followed by a 7.5k attack (edit: on PLATE). For those, since they come alone, it's simply a crapshoot whether you'll make it or not.

Bog overlords are a DPS race to down them before they grow to unmanageable buff stack. Defenders in slave pens are easily kited and there is only one pull that includes two defenders and more than one other mob. (A skippable pull) Two out of three of these mobs have clear strategies to make the pulls less rough. Nightbane comes right out of the gate looking to two shot your tank. This fight makes me breath a sigh of relief when it's over for the week, the prince is probably the only other khara fight.