-Tomas heals himself of 2 more Wounds.
-Reminder post to DM: update this on your notes when you get back home.
Tomas examines the shaman's staff. The green crystal on the end of it is loaded with Chaos magic. He is pretty sure it's what corrupted the goblins in here and nurglingified them. He also determines that it is controlling the forcefield around the fountain chamber, but that there is a second one somewhere else. Destroying the crystal would release all of its energy at once, and since its energy was what disfigured these goblins, that would probably kill everyone in the dungeon except maybe Throg (and whomever it didn't kill would be turned into a daemon of Nurgle). But Tomas thinks that if he could get his hands on both crystals, he could bring down the forcefield. Well, not literally get his hands on them: touching them would be bad except, again, perhaps not for Throg. That is probably why the goblins kept it on the end of a stick. It could be carried safely as a staff by anyone who doesn't mind wielding a glowing icon of the Chaos god of pestilence and decay. This would have no immediate combat advantage other than possibly scaring sane creatures away. Any plague it caused would take some time to set in.