In EverQuest, the main boss in The Sleeper's Tomb was Kerafyrm. You can awaken the Sleeper on a server only once. Originally intended to be unkillable. The dragon first awakened in July 2001.
"On November 15, 2003, on the Rallos Zek PvP server, the three top guilds (Ascending Dawn, Wudan, and Magus Imperialis Magicus) assembled over 180 players, along with an assortment of other non-PK players with Sleeper's keys, with the intent to kill The Sleeper. This was in response to an attempt to wake The Sleeper by an Iksar monk named Stynkfyst, who partnered with the largest random-pk guild of the time. Having been a former member of uber-guild Ascending Dawn, he had the knowledge the random pk guild needed to wake The Sleeper. The top guilds did not assemble their forces until word of Stynkfyst's intentions had spread, and it became clear that he intended to wake The Sleeper, forever preventing future guilds from farming the old loot table. Until this point, waking The Sleeper had not been seriously considered by any guilds, as it was believed that waking The Sleeper would make the offending guild's players kill-on-sight to the other guilds of the server. After 3 hours and 15 minutes, at 26% health, Kerafyrm disappeared (despawned). The players talked with the EverQuest Game Masters, and there was a general consensus that a bug had caused the problem, although some suggested (backed by statements from one GM) that higher-ups at SOE had purposely despawned Kerafyrm, because it was not intended to be part of the story.
The following day, the players logged in to find that Kerafyrm was back in his "sleeping" state, ready to be triggered again.
On November 17, 2003, after a nearly 3-hour battle, Kerafyrm was defeated."
He left no loot behind and disappeared 30 seconds after his death.
(Wiki)