A pro-Assur faction appeared at the royal Mitanni court, which enabled Assyria to finally break Mitanni influence upon Assyria, and in turn make Assyria an influence on Mitanni. His son and successor Ashur-uballiṭ I  would take full advantage of this and destroy the Mitanni Empire.
The presence of a pro-Assur faction at the Mitanni court gave Assyria the power to end Mitanni's control over them, allowing Assyria to become influential in Mitanni instead. Ashur-uballiṭ I, his son and successor, used this opportunity to destroy the Mitanni Empire.