all persons in your party will need to have the quest to kill cerberus (call of hell)
or have already finished the cerberus quest
some things to keep in mind when you do the final quest
have plenty of uni pills, plenty of mp and hp pots
plenty of pet pots, and uni pots for pets too
if you can get a cleric to go with you that would be good for your party
there is a time limit to kill cerberus
so be sure you have a strong enough party to kill him (20 minutes i think)
4 - 5 players in about the 25 - 35 range should do it easily
oh be sure you do have more than one who can res, if you do with the lower lvl players
