The Pandemonium Warden is a new boss in the MMORPG Final Fantasy XI that requires an estimated 24 hours to defeat. The FFXI linkshell Beyond the Limitation attempted the fight for 18 hours before finally giving up due to players passing out and getting ill from the effort.Joystiq: New Final Fantasy XI boss could take 24 hours to kill (August 14, 2008)

The Pandemonium Warden begins the fight in the form of a Dvergr and then transforms into 19 other mobs throughout the battle. As each form is defeated, the Pandemonium Warden takes on the next form with full health and must be beaten again.

The forms of the Pandemonium Warden include:

1. Battleclad Chariot
2. Long-Bowed Chariot
3. Armored Chariot
4. Long-Armed Chariot
5. Acrolith
6. Mamool Ja Knight
7. Troll
8. General Zazarg
9. General Gadalar
10. General Rughadjeen
11. General Mihli Aliapoh
12. General Najelith
13. Gurfurlur the Menacing
14. Medusa
15. Gulool Ja Ja
16. Vampyr
17. Hydra
18. Khimaira
19. CerberusFFXIclopedia: Pandemonium Warden

1. In 2005, a 28-year-old South Korean man identified only as "Lee" died after a 50 hour gaming marathon in an internet cafe. Lee had been playing the real-time strategy game StarCraft, and had not slept or eaten sufficiently. It should be noted that, in South Korea, "professional gamers" are treated like rock stars and can make upwards of $100,000 per year.BBC News: S Korean dies after games session (August 10, 2005)
2. In July of 2007, an 18-year-old Brazilian boy named Aguinaldo César Alves was struck by lightning while playing—ironically—Mortal Kombat. Alves was playing with one controller in his hands, and another in his mouth. He explained his experience thusly: "When I regained consciousness, I thought I was dead. I stood up looking back, to see if my body was dead on the floor." This freak occurrence invited puns from blogs and the gaming community, who used words like "fatality," and references to the character Raiden—who uses lightning-based attacks—to make light of the story.Gizmodo: 18-yo Struck by Lightning Playing Mortal Kombat, Raiden Not Involved (July 26, 2007)