User blog comment:Master Sima Yi/Assassinews 10-05'12 — World Gameplay Premiere/@comment-25419730-20120513023428/@comment-1888015-20120513104300

I doubt it will be a grapple of sorts, but I can imagine him using it in a Prince of Persia style of free-running.

For example, he can throw it up to a suitable space, such as a hook or post, and then use it as a rope to rappel his way up or down buildings for a certain length.

As well as that, it could give him a longer swinging range if he wraps it around a beam or something.

As well as that, maybe it can help him activate switches. Throw the rope dart and it wraps around a high up lever, and he uses gravity and his body weight to force it down.