Chrono's you mean?
Kinda had a discussion on it, and there wasn't a great way to put it, but he is talking about Hayate's operations where Exceeds go into magicless unadministered worlds and solve unsolvable problems for them. This is the miracle he mentions.
He then proceeds to tell Hayate that she needs to make this repeatable, so she can apply it to other worlds. One trick pony would not sustain Exceeds I expect.
She also needs to make it into her own thing. Because if she doesn't, why is there a need for Exceeds, when TSAB already intervenes on non administered worlds when magical shit happens that might be a threat to other worlds.