magic-2
Explanation
The Joke
A witch gives a woman a "magical bag," telling her that whenever she finds herself in difficulty, she should reach into the bag and she will find what she needs. The woman is skeptical but later encounters a dangerous situation -- she is confronted by a lady with a block of guns. She reaches into the bag and pulls out... weapons. The bag is simply filled with weapons. There is no magic at all; it is just a bag stuffed with guns and other armaments.
The punchline lands when the woman says "No, hey, I'm not complaining" -- she initially expected something mystical but is pleasantly surprised that a practical (if violent) solution works just fine. The "magic" was never supernatural; it was just being prepared with a large arsenal.
The Humor
The comic plays on the classic fantasy trope of a magical bag of holding or a mystical item that produces exactly what you need at any given moment. The subversion is that the bag's usefulness has nothing to do with magic -- it is literally just full of weapons, which happen to be useful in dangerous situations. The woman's acceptance of this decidedly non-magical solution ("I'm not complaining") adds an extra layer of humor, suggesting that pragmatism trumps mysticism every time.