200 players took 4 hours to kill Kerafyrm the Sleeper.

Lore: It is almost unkillable because, in a rare and ill-fated experiment with something approaching dynamic content, the sleeper was to be freed by a heroic group of players acting against the wishes of the Claws of Veeshan. Kerafyrm is the spawn of dragons of two different colours, meaning its genetic structure is that of a very large and angry dragon. It took the combined might of dragonkind to seal him in a lair - a lair conveniently stocked with a massive timesink of a crawl and lots of loot. His various golem and dragon guards have the loot; once all four dragon guards are dead, Kerafyrm is free to wreak havoc over Norrath. That is to say, pre-arranged scripts run in a few zones such as Skyshrine, The Great Divide, Nagafen's Lair and Permafrost, and Sleeper's Tomb. The event was allowed to run only once per shard and resulted in new (read: lesser) loot tables in the parent zone. The result of this superpowered dragon romping through zones populated by players of various non-uber was massive, uncontrollable death and general outrage, angst, etc on the whineplay boards.

Numerous patches have made the zone more tolerable in its "awakened" state, however there has been no method created to put the genie back into the bottle.