Thought that was CHIM, he's asking specifically who actually used the process called "The Scrarab that Transforms into the New Man" (out of the list of The Numidium. The Endeavor. The Prolix Tower. CHIM. The Enantiomorph. The Scarab that Transforms into the New Man) to reach the final sub gradient.
Maybe the "The Scarab that Transforms into the New Man" was the attempt by the Dwemer to transform themselves into the Numidium?
Here's my reasoning behind that:
1.) Lorkhan is commonly associated with the Scarab, and his heart was the heart that was supposed to be used to power Numidium. That's the Scarab part of the anology.
2.) It is known (or at the very least, theorized and generally accepted) that the Dwemer became the "golden skin of Numidium." Hence, the Tranforming part of the anology.
3.) Considering the Dwemer are the Skin and the Scarab is the Heart, i'd surmise that the Numidium in this equation was intended to be the "New Man," the final product of the Dwemer's attempt. Whether the attempt failed or not is irrelevant; an attempt is still an attempt, the act of one trying to achieve something.
I'd say this is a likely option for the "Scarab that Tranforms into the New Man" attempt. Makes sense to me, anyway. What do you guys think?