Urza smiled. "Your courage is laudable, child, but you couldn't hope to succeed. We will talk no more about it." He reached for the portal. Xantcha retreated, folding her arms defensively over her belly. "Come child, you have no need for such an artifact. It is beyond your understanding. Let me have it."
"I'm not a child," she warned, the least incendiary comment seething on the back of her tongue.
"You see, simply having a Phyrexian artifact so close to you taints you, as that name, yesterday, threatened to taint me. You haven't the strength to resist its corruption. You've become willful. Between that and your heart ... You're overwhelmed, Xantcha. I should take them both from you, for your own safety, but I will leave you your heart, if you give me the ambulator."
"It's mine!" Xantcha protested. "I rolled it up."
She'd seen born-children in her travels and recognized her behavior. Urza didn't have to say another word. Xantcha handed the ambulator over.
"Thank you, Xantcha. I will study it closely."
Urza held the ambulator between his fingertips where it vanished. Perhaps he would study it. Perhaps he would find a way to add its properties to her cyst. Whichever or whatever, Xantcha didn't think she'd see it again, but she kept her heart. Urza could have everything else, not that.
He 'walked through two more worlds that day and two more the next and the next after that, making knots in their trail. After two score worlds in half as many days, Xantcha swore the next would be her last, that she'd let go of his hands and remain behind. Any world would be better than another between-worlds passage. But the next world was yellow gas, wind, and lightning that seemed particularly attracted to her armor, and the world after that had no air. Urza made an underground chamber where Xantcha could breathe without her armor and catch up on her sleep.
They came to a swamp with cone-shaped insects as long as her forearm and an abundance of frogs, not Xantcha's favorite sort of place. It reminded her of Phyrexia's First Sphere, but she could breathe and eat and the water, though brackish, didn't make her sick.
"This is far enough for me," she announced when Urza held out his hand. "I don't need to visit every world."
"Only a few more," Urza protested.
He'd begun to pace. Since Phyrexia, his restlessness had steadily worsened until he could scarcely stand still. He didn't even try to sleep.
"I'm tired," she told him.
"You slept last night."
"Last night! When was last night? Where was last night? The world with the yellow trees or the one with two suns? I want to stay put long enough see the seasons change."
"Farmer," Urza chided her, a distinct improvement over 'child' and the truth as well. She'd spent too much time scratching in Phyrexia's sterile soil not to appreciate worlds where plants grew naturally.
"I want a home."
"So do I." An admission she hadn't expected. "It's here, Xantcha. Dominaria ... home. I can feel it each time we 'walk, but at every step, a darkness blocks me. The darkness was here the last time, before I found you. It was like nothing I'd encountered before. I was sure it would pass, but it hasn't. It's still here, and stronger than before."
"Like a knife?" she asked, remembering the rumors of newts trapped on the nether side of broken portals.
"A knife? No, it is as if multiverse itself had shattered, as if Dominaria and all the planes that are bound to it have been broken apart. I have 'walked all around, approaching it from every vantage, yet each time it is the same. There is a darkness that is also cold and repels me. I've been making a map in my mind, a shape beyond words. When it's done, I will know that Dominaria is completely sealed from me and Phyrexia.
"It is my fault, you know. It's not merely vengeance that I require from Phyrexia. I require atonement The Phyrexians corrupted and destroyed my brother; that's vengeance. But we, my brother and I, let them back into Dominaria when we destroyed the Thran safeguards. The land itself has not forgiven me, won't forgive me until I have atoned for our error by destroying Phyrexia. Dominaria locks me out, as it locks out the Phyrexians. I cannot go home until I have done what not even the Thran could do: destroy Phyrexia!
"I want to go home, Xantcha. You, who cannot remember where you were born, cannot know true homesickness as I know it. I had not thought it would be so difficult. The land does not forgive. It has sealed itself against me. But it has sealed itself against Phyrexia, too, and though my heart aches, I am content with my exile, knowing that my home is safe."
Xantcha rubbed her temples. There was truth, usually, tangled through Urza's self-centered delusions. "Searcherpriests don't "walk between-worlds," she said cautiously, when she thought she had the wheat separated from the chaff. When conversation touched Mishra, Dominaria or the
mysterious Thran, Urza's moods became less predictable than they usually were. "They use ambulators, but I don't know how they set the stones to find new worlds. Maybe you can't be quite certain that Dominaria is safe?"
"I'm certain," he insisted.
Her thoughts raced along a bright tangent. "You figured out how to set the stones on my ambulator?"
"Yes. I set it for Dominaria, and it was destroyed."
Xantcha's mind went dark. There was much she could have said and no reason to say any of it. She turned away with a sigh.
"When I know, beyond doubt, that Dominaria is inaccessible, then I will look for a hospitable plane. I mean to take your advice, Xantcha. I will build an army three times the size of Phyrexia, and ambulators large enough to transport them by the thousand! I examined your ambulator quite thoroughly before it was destroyed. I can make you another once I find the right materials, and can make it better."
Urza expected her to rejoice, so she tried. She took his arm and followed to a "few" more worlds, thirty-three, before he was satisfied that Dominaria was inaccessible behind what he called a shard of the multiverse. Urza insisted that, compared to the mul-tiverse, a thousand worlds could be properly termed a "few" worlds. The multiverse meant little to her. Urza's efforts to explain the planes and nexi that comprised it meant less. But the fact that Urza did try to explain it meant a lot.
"I need a friend," he explained one lonely night on a world where the air was old and nothing remained alive. "I need to talk with someone who has seen what I have seen, some of it, enough to listen without going numb from despair. And, after I have talked, I need to hear a voice that is not my own."
"But you never listen to me!"
"I always listen, Xantcha. You are rarely correct. I cannot replace what the Phyrexians took away from you. Your mind is mostly empty, and what isn't empty is filled with Phyrexian rubbish. You recite their lies because you cannot know better. Your advice, child, is untrustworthy, but you, yourself, are my friend."
Urza hadn't called her child since they "walked away from Dominaria, and Xantcha didn't like to think that after so much time together, he continued to distrust her, but an offer of friendship, true friendship, was a gift not to be overlooked.
"I will never betray you," Xantcha said softly, taking his hand between hers.
It was like stone at first, flexible stone. Then it softened, warmed, and became flesh.
"I want nothing more than to be your friend, Urza."
He smiled, a rare and mortal gesture. "I will take you wherever you want, but I would rather you wanted to remain with me until we find a plane that satisfies both of us."