After dispatching the ritual happening on the stone bridge, the party and the members of KB&S investigated the prayer chamber. In it was a large pool of clear water, an aarakocra turned to stone, and on the far wall a massive holy symbol spanning the entire segment. There was an ominous feeling of absence in the entire location, though they did find three scrolls of dispel magic.
Moving on up, they antagonized a large group of owl aarakocra even though they had no reason to, and took a lot of damage, before investigating the 4th-floor ballroom where Zephyr saw something shiny and promptly stepped into the nest of Rugs of Smothering.
Bolting out of there, they emerged at the top; a large circular arena where Morgan awaited.