Mechanism
Glinda looked at the mechanical head with disdain.
She vividly remembered when she saw it for the first time, and how she cowered behind Elphaba (not one of her finest moments, but in the whole scheme of things, not one of her worst either).
How many others had he terrified? How many other hopeful Ozians felt their dreams disappear when they were met by machine? Pathetic, really, how even the Wizard had to hide behind a mask.
That head, she decided, would be the first thing to go. For now on Ozians would know exactly who they were dealing with.