Bag of Beings

This item is magically linked to the life force of the devil who created it.

This bag made from tanned human hide and resembles the shape and colour of a human heart. Reaching inside the bag, however, reveals the presence of a small, metallic coin. This coin contains the soul of a humanoid who has sworn a contract of service to a particular devil. 

You can take a Magic action to pull a coin from the bag and throw it up to 20 feet. When the object lands, it transforms into a humanoid you determine by rolling on the corresponding table for the bag. See the Monster Manual for the creature’s stat block. The creature vanishes at the next dawn or when it is reduced to 0 Hit Points by bursting into flames and melting into a lemure before returning to the hells to continue their service.

The creature is loyal to you and your allies, though their behaviour is frightful and confused, and it acts immediately after you on your Initiative count. You can take a Bonus Action to command how the creature moves and what action it takes on its next turn, such as attacking an enemy. In the absence of such orders, the creature acts in a fashion appropriate to its nature.

Once three coins have been pulled from the bag, the bag can’t be used again until the next dawn.