This is most evident when Israel lost battles against its ancient foes.
"I think they sensed the presence of their ancient foe."
Goblins swept past Felix to get at the dwarf, their ancient foe.
All questions about the human Knight were forgotten, overshadowed by the dark wings of an ancient foe.
It gave Michael great satisfaction to seize his ancient foe and jerk him off the ground.
He might as well have been talking about the Federation instead of an ancient foe.
Glaedr felt the scales on his shoulders crawl as he recognized the voice of their ancient foe.
So, you are one of our ancient foes, after all.
"I am not one of those you term 'our ancient foes,' but, yes, this has been a terrible misunderstanding."
He has met our ancient foe and he has prevailed.