Probably one of the coolest commissions, and I can't wait for the final form!

Pneumagogs are MTG's most woefully underrated creations. They are the most perfect of the old Phyrexians created by Yawgmoth: described as such:

"While most Phyrexians were creatures of flesh and machine, Yawgmoth's Inner Circle belonged to another phylum entirely. The pneumagogs dwelt between the physical and the metaphysical worlds. They had bodies, yes - red-shelled bodies of living metal. Their insectoid legs could gallop across ground, and their rasping wings could slice through air. But these mechanisms were only the loci of their being, rooting them in time and space. Pneumagog bodies were wrapped in layer upon layer of scintillating spirit. This was the true essence of pneumagogs - brilliant, glowing, emphatic souls. Nowhere else in all the Nine Spheres did pneumagogs exist fully. When they ascended to higher spheres, only their living-metal bodies went. When they descended to lower spheres, only their spirits went. In was here, in the sixth sphere, that they were a glorious amalgam of physic and metaphysic."

The sixth sphere itself is pretty much a plains with white sky, so I seriously have a hard time believing Old Phyrexia only had access to Black mana when these are clearly White (and Red?) aligned.

They also hide their feet and faces with their wings, because why not, they might as well be Magic's take on seraphim.