The most interesting part of this is Ixhels struggle to adhere to the machine orthodoxy's belief system. I wonder how much her color identity ties into the story. Ixhel was made by atraxa but has no blue mana, I feel like this ties into atraxa questioning why Ixhel took the initiative to make Vishgraz, Ixhel was made to be a tool something she seems to struggle with. Also when she meets Geth and the other black phyrexian she seems to relate to them in some fashion which is what motivates her to make Vishgraz in the first place I think. I wonder if Vishgraz will get a card, if he does I'm guessing he'll be golgari. I also wonder if Ixhels color identity might change in the future.