Asher didn't use it. He had to see the person so he could use the Element follower. But he had no access. He could give it to Rose though. But how was he going to get it to her? He cannot visit her without alarming people.
The workers here were just workers. They were servants in a way. But they were restricted. He was a fake worker so he had to keep in mind and act like them so as to not get caught.
"Mom, how can I give it to Rose?"
"I can do it. No one can see me anyway."
"Last time, Rose saw you."
Cora shook her head.
"It was because I manifested myself, otherwise only you can see him. I'll leave it there quietly."
"Mom, can you go just use it on our enemy then? It is straightforward and it tackles the root of the problem."
"Silly Ashy, he would have a barrier and I don't think I can pass it. He can make those people who he wants to see appear in it."
Asher was still not convinced.