There once was a boy named Milo who didn't know what to do with himself--not just sometimes, but always. And then the dragons arrived. The Phantom Tollbooth - Norton Juster
When Mary Lennox was sent to Misselthwaite Manor to live with her uncle everybody said she was the most disagreeable-looking child ever seen. And then the dragons arrived. The Secret Garden - Frances Hodgson Burnett
The glorious city of God is my theme in this work, which you, my dearest son Marcellinus, suggested, and which is due to you by my promise. But now the dragons have arrived.
'It was a queer, sultry summer, the summer they electrocuted the Rosenbergs, and I didn’t know what I was doing in New York. And then the dragons arrived. Which would have made that book a hell of a lot better.
Lorsque j'avais six ans j'ai vu, une fois, une magnifique image, dans un livre sure la Forêt Vierge qui s'appelait «Histoires Vécues». Et puis les dragons sont arrivés. [Le Petit Prince].