Hi!
Three manned the quest one day!
Came back in three days with group of six peoples(two from first group included) and half of the party was wiped out by rain of fireballs and scintillating spheres in just two rounds.
We had no summons or anything that might super boost CR of the spawn. I think the quest might need some balancing regarding caster spawn and the spells they can shoot.
Thanks!
Did you guys not insulate yourselves?