He sees some rock here than can be used as a ledge across the chasm and orders the elementals and demons to get it up so that the party can cross. Alzar uses Broom of Flying for humans and gargoyle cloaks to ferry across undead.
They arrive at a room with a wounded Duergar and another that were knocked off course while hunting Darkscape mushrooms. They know enough to try and lay low. Alzar tells them that they will return for them after investigating the nature of the corruption. They doubt he will, but he leaves behind water and food for them for a week, just in case.
They arrive at the western edge of a nasty bit of corruption. It has been blocked by a wall, but what a wall. The barrier appears to be a rotting bulwark of limbs, hands, bones and faces. Twisted and fused together into a mass of protoplasm and with a humanoid form in the center. She demands to be pulled free from the wall.
Alzar pulls out a crossbow and takes aim, firing at the wall. A hand snakes out and stretches with the protoplasmic matter and reaches him from 20’ away and attacks him. He backs up 45 feet away, the max, and attacks. It can’t reach that far. He orders everyone back here to attack with missiles. It takes a while, but they manage to destroy it, and he uses Acid and Fire on everything to prevent regeneration.
As they move through the area protected by the wall, they leave behind the Twisted Caverns and enter the Inner Sanctum.
Slain – 42 Duergar, 3 Giant Skeletons, Crypt Thing, 13 Giant scorpion, 17 large bats, 4 Steeder, 7 Gibbering Mouther,115 Gibberling, 5 Brood Gibberling, 1 Giant Gibbering Mouther (worth 1950 XP), 1 Whisper Spider (worth 3000 xp), 1 Living Wall (5000),
Used – Conjure Earth Elemental, Stone and Mud Ring Elementals, Passwallx2, Speed Potion, Skulltrap, Animate Dead x2, Invisible Stalkerx2, Earthquake from Orb,