My original idea was a hangman's noose but the chain particle can't be changed and rope at the end of a chain made no sense. So we end up with this cool choke chain to reel in the fresh meat.

A noose's original purpose was to snap one's neck when they dropped from the gallows, and not to strangle. Hence why it works to do damage on contact, it would constrict and tug at the hero. As well for basic attacks, a big chain is a brutal blunt weapon.

While it's not a "hook" I think it works with the character and animations if you keep an open mind.