As the boulders are not that fast, Hagar, Elmore, and even Ahearn can move
out of their range with relative ease. They will each take a parting shot
but no one gets hit.
Sean will be able to put two arrows into the chanting boulder and a magic
missile will knock pieces of rock off the thing.
Cara is a bit exposed. Holly and Johnny should both be able to fly away if
they wish at this point.
Actions?