Help. stuck in Lab. I have the mandrake and an alchemist of a high enough level(16) to make potions. But when I put the modified mandrake on the bench and the wyvern stingers on the other and pull the switch, I get a message that it's broken(switch) ! I think I may have killed the guy who is suppose to fix it or make potion. Is there a work around ?

Just in case, the switch should be the southern one of the pyramid base.

Also, you need Modified mandrake root to make the potion not mandrake root.

Now, the switch will only be repaired after you presented Nheero the Modified mandrake root.