Re: The strange rainbow.
Concerned, as you are, you press ahead with your plan to burn the giant webbing structure. Flasks of acid, and vials of Alchemists fires are dropped behind you, as you run for the entrance.
You can feel the flames hot behind you, and acrid smoke starts to fill the empty spaces, with some billow up close enough to you, that you feel your noses and throats itch. However, you reach the entrance, and force yourselves through into the orchard, prepared to douse any flames that follow you through into Netherworld. However, it is tendrils of the acrid smoke that follow, rather than the flames that you feared.
Looking around for a way to plug the hole, you notice that the smoke is suddenly cut off, and no more is escaping and a quick check, shows that the hole has closed itself over, apparently of its own accord.
A soft voice echoes inside your head, It is over. Well done. Then silence.