So my current game is going to be coming to a close soon. We're beginning to lose some steam for the game, and we're approaching a logical conclusion (and as far as the players are concerned, it will be the actual end), so I'm going to go out strong, instead of letting the game peter out. But that's not what this post is about. The next game that I'm going to be running is an epic level 3.5 game. I thought I'd throw out a general plot that I've put together and get some opinions and suggestions.
The characters are yet to be determined, but they will be level 21. They will probably begin in sigil, retired adventurers enjoying their new lives. There will be some sort of hook. The first portion will use the basic outline of the Death's Reach module from 4e. The players will have to go to death's reach, an ancient battlefield from the dawn war, and now the gateway that souls use to pass into the afterlife, because Orcus has found a way to enter the area, and if he is not stopped, he will gain power unimaginable. However, the real reason he is going there, is because he's being tricked by Vecna to retrieve the dormant soul of Timesus, the Black Star, a Primordial.
Unfortunately, they will get there too late to stop Vecna's archangel from taking Timesus, leaving the party to face off with Orcus. After they do so, sealing Death's Reach back up, they must find out who that other creature was. Their investigation will lead them to Osterneth, the Bronze Lich, and Vecna's mightiest mortal servant. Over the course of their research, they will find out that within her heart beats the actual Heart of Vecna, which he gave to her. They can kill her, but unfortunately they don't possess the power to destroy the heart. For that, they need the only weapon that has tasted Vecna's flesh, the Sword of Kas.
After Kas was destroyed by Vecna for his betrayal, his soul did not pass through Death's Reach, but instead was captured by Mephistopheles for reasons known only to him. However, that means that the party must head to the 8th level of hell, Cania, and make a deal with the devil. In exchange for Kas, the party will have to search through an ancient citadel in the frozen wastes, barred to all immortal beings, and bring to him the secrets within. Upon their success, Mephistopheles frees Kas from his icy prison, for the party to do what they will.
After all of this, the party finally can destroy the Heart of Vecna, giving them the ability to harm Vecna. They must travel to the plane of Pandemonium to find Vecna's secret tower and confront him, once and for all.
So there you have it, that's the story, but I'm curious if anyone has any suggestions for encounters and tricks and whatever for epic level characters I would love to hear them!