Bag of Withholding

This item functions as a Bag of Holding, safely storing up to 500 pounds of gear in an extradimensional space. However, the bag is semi-sentient and highly possessive of its contents.

Stubborn Retrieval: When you take a Bonus Action to retrieve an item from the bag, you must make a DC 15 Charisma (Persuasion) or Strength (Athletics) check to coax or pry the item free. On a successful check, you retrieve the item normally.

On a failed check, the bag's opening violently cinches shut. The bag refuses to yield that specific item until the next dawn. Alternatively, you can bypass this stubbornness by feeding the bag a bribe of 10 GP as part of the Bonus Action to retrieve the item, causing the bag to immediately cough it up.