Bolt of Anchoring

This magic piece of ammunition weighs 1 pound but otherwise flies exactly like a normal arrow or bolt. When you hit a creature with a ranged attack using this ammunition, that creature must make a DC 13 Strength saving throw. On a failed save, the creature is grappled by the arrow for 1 minute as the chain magically extends and wraps around the target. On a success, the creature's speed is halved until the start of your next turn instead. A creature grappled by the arrow in this way can use an action to repeat the saving throw, ending the effect and freeing itself on a success. After this effect ends, the ammunition clatters to the ground and becomes a 2-foot length of nonmagical chain.

Ammunition: You can use a weapon that has the ammunition property to make a ranged attack only if you have ammunition to fire from the weapon. Each time you attack with the weapon, you expend one piece of ammunition. The ammunition of a firearm is destroyed upon use. Drawing the ammunition from a quiver, case, or other container is part of the attack (you need a free hand to load a one-handed weapon). At the end of the battle, you can recover half your expended ammunition by taking a minute to search the battlefield.