Nov 15 The most hardcore thing you can do. In vanilla? I have a few things that could be it. Playing on a perma death PvP server and kill kel'thuzad. Without dying even once. Being able to kill a mage/rogue/warlock/pally in all BiS gear Soloing a high end dungeon boss like rivendare or dark master gandling. Leveling to 60 with no gear or weapons or pet of any kind. That is by far the most hardcore, life threatening thing you can do in vanilla wowHavell7 Nov 15
Some class systems from the original game simply don’t have a modern equivalent. The class probably most affected by this is the hunter. The pet happiness and loyalty systems were removed a long time ago, as well as pet training and the ability to use both a ranged weapon and a melee weapon. In these cases, converting the old data to the new system wouldn’t work, simply because there is no new system to match. In this instance, we had to bring back the old code—and we did. Fortunately, the restoration went smoothly, though the reality of having to buy arrows or feed their pets again took a few people in our internal tests by surprise.
 ":"  -  Any time a step ends in a ":" instead of a "." means that the next step is part of the current step you are on.  This generally means the next step should be done while working on the current step.  This means every "start working on" or "continue working on" will end in a ":".  But this is used with other occasions as well, so keep this in mind.