Even here, Emet-Selch cannot make the shadows stand against the light. The alley is dark, yes, and full of shadows he can bend to his will. But he lacks the strength to let darkness grow triumphant. To make it equal to the blinding gaze of the light, not when it is Elidibus' hand wielding it.

He does not try. The light cleaves the darkness in twain, shadows wisping away to nothingness under the magic Elidibus wields. Nor do they rise again, but there are greater problems at hand. Namely, the fact that Emet-Selch is closing in quickly, making the most of that momentary delay and the utter failure of Elidibus' trap, and though he is not yet so near as to be able to reach out and take hold of his prey (not with more than shadow anyway) he has still very neatly eliminated any advantage Elidibus might have gained by his earlier flashbang.

"Even you cannot run forever. Balance or no."

Though Emet-Selch can admit that Elidibus' light has certainly been effective, and a weapon that he cannot easily defend himself against.