Nahiri had once guarded the Eldrazi prison on Zendikar while Sorin and Ugin promised to return if it weakened. When neither answered, she repaired the network alone and confronted Sorin on Innistrad. Their conflict ended with Nahiri sealed inside the Helvault, unable to return home as the prison failed again.
Freedom brought her back to a devastated Zendikar. Nahiri treated that loss as evidence that Sorin’s home should endure the same terror. She shaped stone across Innistrad into a vast signal, bent the plane’s cryptoliths toward one purpose and used the moon and landscape to call across the Blind Eternities.
Her revenge deliberately exceeded Sorin. Farmers, cathars, spirits and entire ecosystems became the medium of a dispute most inhabitants could never understand. Nahiri’s love for Zendikar had become an argument that another home could be sacrificed, repeating the old logic that placed Eldrazi risk on her own plane.