Adventure Two, Session Four Recap

To be continued after the holidays...
Will the heroes follow Lord Vorliss in an attempt to rescue Zelna and the Rod of Ryktuss? Will Vorliss use the rod for some unholy end? Check back in a few weeks to find out!...
UPDATED...
As Lord Vorliss made his escape atop his Nightmare steed, Zelna in tow, the party gave chase through the busy streets of the city. They were forced to steal a few horses in order to match his pace, though Teffa actually transformed into a war horse. Eventually, Oltorf closed the gap and managed to leap onto Vorliss' steed. He grappled the Death Knight and the two fell to the earth, just outside the city walls.
As the other members of the party caught up, Vorliss struck Oltorf down, leaving him to die. However, Oltorf was stabilized by Fluff and Guy managed to toss two beans from his magic bean bag at Vorliss' feet. One of them sprouted into a giant Treant, knocking Vorliss off his feet and tossing him back ten feet through the air. Vorliss, in turn, set the tree creature ablaze with a powerful flame spell.
It soon became clear that the battle was not going to end well for the party, even though they managed to kill Vorliss' nightmare. At this point he gave them a choice, back down or be destroyed. The death knight proclaimed that he didn't wish to kill them, only to leave. The party agreed, as long as Vorliss left Zelna behind. Vorliss said he wouldn't take her with him, bur couldn't leave her there with them. He then cast an unknown spell, and Zelna seemed to disintegrate right before their eyes. Shocked at Zelna's apparent death, the party renewed their attack on Vorliss, who then used some sort of magic cube (possibly a cubic gate) to teleport away.
It was just about then that Quinias Merto finally arrived. He brought news of the missing eye to the Rod of Ryktuss. He tracked it to an auction house in Angleport where, in a week's time, it was to be auctioned off. After healing the party, Quinias put them on phantom steeds and sent them to Angleport, in an attempt to intercept the "eye" (actually a cloud diamond). Once in Angleport, the party sought out the auction house and, after charming a janitor into letting them in, managed to steal a bidding sheet containing a lot of useful information, including which items are up for grabs and when the event is taking place. It also informed them that the auction is open only to members of something called "The Basilisk Club."
Now, the only thing left is to figure out how to infiltrate the "invitation only" event.