When I got to the Myconids, I zombified a dead Duergar using Glut's spells.  He died at one point.  He's still in my party and I cannot remove him. 
Glut can cast his spells every turn.  I noticed this also with Halsin when he was a bear.  It seems all NPCs that join your party can cast their spells every round and don't have to track spell slots.  Since Glut has an AOE Haste spell, that's pretty powerful
I retrieved the Sussur bark from the Sussur tree and went back to the goblin forge and tried to merge it with a weapon, but one of the slots has the <image not available> icon that looks like a rat's tail in it and so I cannot combine it with anything to make the masterwork weapon.   It's not like I need it.  I have plenty of weapons at +1 or better, but... ya know. 
![[Linked Image]](https://i.imgur.com/bgl0Agm.png)