I still haven't played this scenario yet, but the altar is already built
Scenario Two, part three. "Rescue the prince!"
In the center of the table , place a small altar with the bound prince atop it. The barbarian wizard, Balkren, should be placed adjacent to the altar. Surrounding the altar, four chilopendra form the corners of 6" square. There should be nothing inside the square apart from Balkren, the altar, and the prince. The rest of the table should be covered in ruins as normal.