A means of aerial transport jutting from your right hand, capable of launching you on shoulder-dislocating rides above a city in turmoil? Why, where have we heard that one before?
Unlike BioShock: Infinite's skyline wheels, though, the hook-blade itself has an offensive purpose which, more or less, means you can counter-kill with it. Yes, you can rake enemies off of their feet. Yes it has a slashing edge. The hook blade has two parts, you see—a hook and a blade. It's not that complicated, just sit on X/square and everything will be OK.