Rooting snare.

An item crafted from roots and string which stacks to 16 and allows you to ensnare a mob for a shot time, by right clicking on them with the snare in your hand) For hostile mobs the more damage they do and the bigger they are the quicker they break free from the snare. For passive mobs the smaller they are and the quicker they move the quicker the escape the snare. If the mob is killed before they escape the snare isnt broken otherwise there is a 80% it is broken