As an action, you can create a bag of sticky, adhesive, black tar. As an action, a creature can throw the bag at a point within 5 meters, where it bursts on impact. Sticky, adhesive, tar covers the ground in a sphere centered on the point and turns it into difficult terrain for the duration.
When the tar appears, each creature standing in its area must succeed on a Reflex saving throw or be restrained. A creature that enters the area or ends its turn there must also make the saving throw.
On a success, the target is freed.