A what if idea had the Skeksis skekHak (one of the two Skeksis to died right after the Great Division) did not died and continued on to live. Reportedly, he would had the been the Machinist, while urHom (its counterpart) would had been a Carpenter.

Confirmation is needed here: It is my understanding that the J.M. Lee Novels deviate from the Creation Myths canon in where skekHak does survive and the YiYa pair are the only ones to die right after the Great Division of the UrSkeks, with a Rogue Skeksis beating urYa to death with a staff, killing skekYi in the process. If the Archaia/Froud Canon is kept, skekShod and skekNa are order to remodel the castle with stone, as punishment for their defiance of skekSo's Imperial Status as seen in TDC: CM Vol.3, where as in the J.M. Lee Novels canon, is skekHak who does the remodeling.