Use the Eggscilloscope Prototype on an egg in the Rookery.
[player], I've been working hard on a new device, the eggscilloscope! It's designed to project a burst of cold energy at the egg of a black dragon... and freeze it solid! Can you test it for me?
I heard that high up in Blackrock Spire, the dragons have a rookery where they hatch their eggs. That's where you'll have to go to test the eggscilloscope, and then let me know how it worked!
And don't worry. Frozen dragon eggs should be harmless. It's the unfrozen ones you have to worry about!