A small dark black pouch containing bugs that are imbued with the abyss. The bag can be thrown and upon impact with the ground, any creature within a 5ft radius must succeed on a DC 18 wisdom saving throw. On a failed save, the creature is transported to the abyss for one minute but to the creature if feels like a full day. Every round, the creature can attempt to make a DC 18 wisdom saving throw to return to the material plane. For every round the creature remains in the abyss, they take 3d6 psychic damage. If the creature is to die within the abyss roll a d100 to determine what comes back instead of the creature. To create an Abyssal Bag o' Bugs, you must put any piece of a powerful item that originated from the abyss into a small pouch with a handful of assorted insects and leave them for a full year. 

1-20 nothing

21-40 3d4 imps

41-50 1d4 hell hounds

51-70 2 incubus and 1 succubus

71-80 1 Bone devil

81-90 1 Udaak

91-99 1 pit fiend

100 The Demogorgon