I really like this as a quick hit play off the end line. An experienced team may sniff this out. But if you are playing against less experienced Defense,em this can be great.
The idea is to create space above the goal line.
In this play you are forcing the defensemen to make a quick switch. There is not much room behind the goal so it makes it very tight for them to do that. Added to that most defensemen are not always ready for the slip. Especially not off ball like this.
This play can go in either direction depending on what the defense is giving you.