One angel after another, Arad silently stalked each one and swallowed them whole from the darkness, leaving them no chance of fighting back.
Diana had only trained Arad for a while. But he had found himself having to use all of that knowledge against a whole army of powerful angels, sneaking through the lightless void and hunting them one after another like he was a night predator.
The more Arad hunted, the easier it became to move around, but the harder it became to strike individual angels as they were slowly coming to notice that magic might be at work. It won't take them long to notice the time slowing spell, but Arad should've hunted them all by that time.