Ajani - Visualizing planes while planeswalking

His vision flooded with light as he watched Naya melt away—and in the last moments of his planeswalk, he saw the earth overturn itself. Soundlessly, trees uprooted themselves, and huge slabs of stone upended. His last impression was of lava spouting forth into the Naya sky—an impossible sight, but he saw it char the jungle trees and send up a cloud of black smoke into Naya’s sunny sky.

It must have been his own memories of Jund, he thought, overlapping with the strange sights of his planeswalk—and his own fears of his world’s destruction encroaching on his mind.

But in the fleeting moment as he stepped between worlds, he saw exactly what he had feared to see: the five worlds were one.

Naya had overlapped two other worlds, its rough, green sphere merging with the blue-and-gold heaven of Bant and the fiery hell of Jund. Beyond them, the mostly sea-covered world of Esper linked with the shadow world of Grixis. The five of them formed a kind of irregular chain. In the center, where there was once an eye between them, all five worlds had come together and had—just barely—touched. What destruction all of it was causing, he couldn’t tell. But before Ajani knew it, he was somersaulting into Jund, just as a massive stone pyramid of Naya thrust its way up through Jund’s surface below him.

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Alara Unbroken, Chapter 49