Tries starving/freezing himself

Urza had returned to Argoth and Tawnos as the snows had begun, almost exactly one year ago. He'd denied himself sleep or shelter, kneeling in the snow, waiting for Mishra, or death; it hadn't mattered which. But Meshuvel had been correct: Urza had transcended death, and he'd found, to his enduring dismay, that he lacked the will for suicide. A late spring had freed him from his icy prison. He'd stood up, no weaker than he'd been when he'd knelt down.

The left side of his face had been raw where bitter tears had leaked from the Weakstone, but it had healed quickly, within a few moments. He'd walked away with no marks from his season-long penance.

***

Planeswalker, Chapter 1