Three days.

Nearly three days and we hadn’t managed to kill him.

...

He was teleporting less often than he had at first, and there were a number of heroes who were appearing regularly on the scene.  Legend, Alexandria, Eidolon, they were stepping up, though they’d started taking breaks, shifts.  Legend would skip one, then participate in the next two.  Alexandria would do two on, then two off.

Scarab 25.5