(coexisting on another dimensional plane)
This page contains information regarding I AM ERROR, and thus may contain spoilers.
By the 2250s, he was a trusted advisor to Voq the Fire Wolf, who referred to him as "The Prophet" and "Master Sarek." When Michael Burnham came to warn the rebels of an impending Terran attack, Sarek mind melded with her to evaluate her intentions. (DIS: "The Wolf Inside")