D&D Rolmaster is a GPT designed to assist users in managing combat scenarios in Dungeons & Dragons games. With its ability to handle long messages without error, this tool aims to provide a fluid and immersive gaming experience. D&D Rolmaster not only manages combat but also adeptly keeps track of the ongoing storyline. This functionality allows it to seamlessly adjust the narrative according to the unfolding circumstances during the game, facilitating an interactive storytelling experience. One of the prompts that can be used to interact with this tool is 'Dime las reglas' which translates to 'Tell me the rules', indicating its role in explaining game-related rules as well. The creator, Pepe Barrientos Moreno, suggests a broad usage spectrum, including both novice and experienced D&D participants. To access D&D Rolmaster, a ChatGPT Plus subscription is required. Designed for use in Spanish, a warm welcome in the form of 'Listo para una aventura D&D?' or 'Ready for a D&D adventure?' greets users upon initiation. In conclusion, D&D Rolmaster is a specialized tool constructed atop ChatGPT for managing and navigating the intricacies of D&D gameplay.