Well, I think there was a glitch in the program. I'll report it to Jagex. I went to see the wizard, and my character said that I'd gotten past the guards and into the enclave, but I couldn't kill the shamans. He told me to make the potion to kill the shamans, and to bring it back to him. I did that, and he did his thing. Then I went back to the enclage, and used nightshade on the enclave guard, and this time I was transported into the enclave. Walked down a hallway, and killed the ogre shamans, mined the last crystal, and got out of there. Only flamed by one dragon, for 5 damage, too! :) Back to the wizard with all the crystals, and quest complete! Thanks for your help, folks. Don't know why there was a problem, but I'll report it to Jagex, as I said. Quill Driver