Harpoon weapon.
Stormwrack, p.107. It's a spear, 30' throw range, that can have a rope attached. Deal damage, reflex check DC10+damage and the harpoon gets attached. Target movement is halved. A Harpoon can have a rope tied on, winning an opposed strength check allows you to keep the opponent within the range of the rope. Target needs to beat a DC 15 Concentration check to cast a spell.