Unless you go the rout of killing every NPC, I don't think it is skipable. Right now I'm in Hunters Edge and since I originaly skipped disabling the barrier, had to go back. The mushrooms told me to find some Mardino guy between the sad and grumpy troll on a cliff.
I originally figured that to destroy the barrier, you had to get deep inside the immaculants. The little "goose chase" the mushrooms sent me on to find this wizard lead to me a nasty death. The cliff that the wizard was "spooted on" has a switch that when you pull it, it will stop two fireballs shooting but creates a lava field that causes instant death.
I'm actually wondering if this wizard guy exists, I'd like to find him to kill him off over that nasty trap.
When you go to destroy the mushrooms to disable the barrier, kill the mushrooms with melee or ranged, don't use magic as that makes them spawn more like crazy.
Last edited by LightningLockey; 26/07/14 10:24 PM.