WoW players are not unaccustomed to tackling giant creatures. We've slain dragons, gronn, elemental lords, and even ogres infused with the raw power of the Old Gods. In our time, there have been some big bads that were, well, literally big. Lord Rhyolith now falls into that criteria -- a massive molten lord covered in rocks so thick and so sharp that spells and blades couldn't even think to but dink away at his hide.
This royalty of the Firelands is one of the first four "fluid" bosses in Firelands. You can reach Lord Rhyolith by following the road to the right, over the bridge and up the gauntlet ramp. There he stands, out on a platform surrounded by lava, begging for players to come and test their mettle against him. This is going to be one tough nut to crack; are you up for the challenge?