Leonin Snare
Adventuring gear, common
Price: 1-3 gp | no sentimentality
This intricately woven snare can be thrown at a single creature or set as a trap when connected to a tripwire. Once thrown or triggered, a creature must succeed a DC 13 Dexterity saving throw or be restrained. A creature can use its action to make a DC 15 Dexterity check and on a success, untangle the snare to free itself or another creature within its reach. Each failed check tangles the caught creature further, increasing the DC of the Dexterity check to untangle the snare by 1, up to a maximum of 20.
Paid
The snare comes with instructions on how to craft your own, requiring 50 feet of rope, 4 stones weighing at least 5 pounds each, and 6 hours to assemble.
Overpaid
Through perhaps divine revelation, you realize a way to throw the snare that increases the DC of the Dexterity saving throw to dodge it to 15.
Source: The Gray Merchant of Asphodel