Binding Dart (3.5e Equipment)
From D&D Wiki
Binding Dart: Binding darts find a use among those who regularly fight enemies with teleportation abilities. A binding dart is a +1 dart. Once per day when you hit a target with a binding dart, the target is affected by the dimensional anchor spell.
Faint abjuration;CL 7th; Craft Magic Arms and Armor, dimensional anchor; Cost 6,190 gp 2 sp 5 cp + 495 XP; Market Price: Price 12,380 gp 5sp