Bag of "Holding"

This standard sized backpack can hold 50 lbs of weight. When this bag is full and you throw it at a creature within 15 feet of you, they must make a DC 12 STR or DC 15 DEX saving throw or be grappled. While wearing the bag, you have the Grappler feat and you are immune to being grappled.

Notes: Immunity: Grappled, Carrying Capacity: Medium, Feat: Grappler, Grappled, Debuff, Container