"That is-well, it's not your heart, Xantcha." He didn't take it. "Your heart beats behind your ribs, child. The Phyrexians lied to you. They took your past and your future, but they didn't take your heart." Urza guided her empty hand to her breastbone. "There, can you feel it?"
She nodded. All flesh had a blood-heart in its breast. Newts in the Fane of Flesh had hearts until they were compleated. "This is different," she insisted and described the vault where countless hearts shimmered. "We are connected to our hearts. We are taught that the Ineffable keeps watch over our hearts and records our errors on their surface. Too many errors and-" She drew a line across her throat.
Urza took the amber and held it to the sun. Xantcha couldn't see his face or his eyes but a strangeness not unlike the between-worlds tightened around her. She couldn't breathe, couldn't even muster the strength or will to gasp until Urza lowered his hand. His face, when he turned toward her again, was not pleased.
"Of all abominations, this is the greatest." Urza held the amber above her still-outstretched hand but did not release it. "I would not call it a heart, yet it falls short of a powerstone. I can imagine no purpose for it, except the one you describe. And you knew where the vault was?"
Xantcha sensed Urza had asked a critical question and that her life might depend on her answer. She would have lied, if she'd been certain a lie would satisfy him. "I knew it was somewhere in the Fane of Flesh."
"You didn't tell me?"
"I didn't want to die with all the rest of Phyrexia. I wasn't certain. I thought you'd laugh and call me a child again, and I would have been too ashamed to follow you."
Not quite an answer, but the truth and, apparently, satisfactory. Urza dropped the amber into her hand. Without conscious thought, Xantcha clutched it against her blood- heart.
"I wouldn't have-" Urza began, then stopped abruptly and looked down at his grass-and-twig dragon. "No, very
possibly your concerns were justified. I do not imagine abominations and have discouraged you, thinking you imagined them. I allowed myself to forget that your mind is empty. Phyrexians have no imagination." He crushed the dragon beneath his boot. "Another mistake. Another error. Forgive me, Mishra, I cannot see when I need most to see and opportunity slips away forever. If only I could relive yesterday instead of tomorrow."
"You can go back as soon as you've restored your strength. If I could find the vault..."
Urza shuddered. "They know me now. Your Ineffable knows me, I cannot return to Phyrexia, not without absolute certainty of success and overwhelming strength. For the sake of vengeance, I must be cautious. I cannot make any more mistakes. I would be found out before I set foot on your First Sphere."
Xantcha kept her mouth shut. It wasn't her First Sphere. Urza had powers that Phyrexia coveted, but he was oddly reluctant to use them. He had to overwhelm whatever lay before him, and when he made one of his mistakes, that mistake became a fortress.
"I could go. I have an ambulator." She lifted the hem of her tunic, revealing the small black disk tucked beneath her belt. "If you made a smaller dragon, I could turn it loose in the vault."
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