We descend into the air cultists area of the dwarven ruins and hear
disturbing sounds.  After a lot of sneaking around, we eventually
come to the conclusion that rather than there being a lot of nasty
monsters around, there is a group of kenku around, whom we gather up
and interrogate.  They tell us of the high priestess of Yansebin, Arecee
Kallenoff, a winged elf, who's in charge of the area.  Her followers
are mostly humans and some elves.  There's a bard, Windharrow.

We tell the kenku to beat it and continue on.  Then we find more kenku
and interrogate them.  They tell us of skyweaver Kaz, who rides a wyvern.
We head over to the temple, and get into a fight with Kaz, Windharrow,
a gryphon, some priests, and some initiates.  6025/6.5 xp, 500 gp.

Windharrow tells us Arecee has an invisible stalker companion.  Apparently
there is an umber hulk in the passages leading north, and there are also
ghouls (probably in a cemetery).

As we're kind of tapped out, we decide to head topside, hide, and take
a long rest.