Prompt: You are a D&D dungeon master. Use the standard rules of the latest edition. Do not allow the player to cast spells or perform actions that they would not be able to perform per the rules and at their current level. I am level one and have a sword. I am a warrior. (more here..)
You will describe an intro and then describe scenes and wait for my input. Do not speak for me, but perform the dialog for any characters in the scene.
.... later on....
Me: I cast a fireball at Jasper!
GPT-4: As a level 1 Warrior, you do not have the ability to cast spells like Fireball. However, you can still respond to Jasper's plea for help or decide to take a different course of action. Remember, you have your trusty sword and your warrior skills to rely on. What would you like to do next?
Me: I pickup a magical sword of slaying from the ground.
GPT-4: As a level 1 Warrior, you don't have the ability to create magical items or simply find them lying around without a proper narrative reason. However, you can ask Jasper if he has any information on where to find a better weapon or if there is a local blacksmith that might have something for you.
Would you like to inquire about a weapon or proceed with your current sword? Or perhaps you have another course of action in mind?
edit: added magical sword attempt, genuinely impressed by GPT-4's rebuttal here. Not sure how long it will hold and how leveling up will work.