Atticus Tower

From the description: When exploring Side A, the adventurers enter the tower of an evil wizard and must slaughter the tower's defenders. If they can clear the first two levels of the tower of opposition, then the heroes may flip to Side B. On Side B, the volume climbs as the party encounters the foul bard Rexorn who is busy transforming suffering into music. Knock out this wicked musician and ascend to the tower's rooftop where the wizard Sors is waiting to murder the intruders.