Disclaimer- I don't own Magic: The Gathering.
It all makes sense now.
All his life, the Ineffable has watched over him, guided him to this very hour...
When he would at last kneel before Lord Yawgmoth, a humble servant.
Urza's entire millennial life has been centered around Phyrexia, though foolishly trying to destroy that which he most loves.
After all, Phyrexia is a world of machine and metal- Urza's world.
Dominaria is a world of colors and magic and nature, everything Urza despises.
Now at last, he knows were he belongs.
Here, kneeling on the obsidian dais, before the Ineffable Yawgmoth.
Now, in this place, beyond definition, he can glimpse the infinite genius that is Phyrexia.
This is what Urza has wanted for... forever. A perfect world, where machine comes to life and spirit and body are one and the same.
And here is the wonderful mercy of the Ineffable. To forgive His most hated foe, Urza Planeswalker, and allow his unworthy self to enter the mind of a god.
How could he have believed he could defeat the Lord of Death? Yawgmoth is infinite, a god of machine and death- perfection.
There is no power that can oppose the Ineffable, no choice but one.
To kneel.
After all, what else can one do, when in the mind of a god?
And most wondrous of all, Urza has found his home.
True, Yawgmoth is the very essence of black mana, but he is beyond that, beyond any mere definition of colors.
He has transcended the colors of magic, and become achroma- absence of color.
A state Urza himself wishes to find.
No longer one of grays, confused about his place in the world. He was never at home in Dominaria.
Only here, in the bosom of Yawgmoth does Urza Planeswalker know where he belongs.
Prostrate before the Ineffable, hoping to know even a fraction of the wonder of Phyrexia.
Almost lazily, the Lord of Death grants his wish, and allows him another view of the wonder of this artificial world.
And even as he continues to kneel, he knows.
In glimpsing the wonder of the Ineffable, Urza too, has transcended.
Now he too is achroma.