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As a game master, I historically avoided significant use of randomization during my Dungeons & Dragons adventures. I tended was for the plot and session development to be shaped by player choice rather than pure luck. However, I chose to alter my method, and I'm incredibly pleased with the outcome.

The Inspiration: Watching a Custom Mechanic

An influential actual-play show showcases a DM who often requests "luck rolls" from the participants. The process entails choosing a specific dice and defining potential outcomes contingent on the roll. While it's essentially no distinct from rolling on a random table, these are created in the moment when a character's decision lacks a clear conclusion.

I decided to try this technique at my own session, primarily because it seemed interesting and provided a departure from my normal practice. The experience were eye-opening, prompting me to reconsider the often-debated dynamic between planning and spontaneity in a D&D campaign.

An Emotional In-Game Example

During one session, my party had just emerged from a city-wide conflict. When the dust settled, a cleric character wondered if two beloved NPCs—a sibling duo—had made it. Rather than choosing an outcome, I let the dice decide. I instructed the player to roll a d20. The stakes were: a low roll, both died; a middling roll, only one succumbed; on a 10+, they survived.

The player rolled a 4. This led to a deeply poignant moment where the adventurers discovered the bodies of their companions, forever clasped together in death. The party held last rites, which was uniquely powerful due to previous story developments. As a parting reward, I chose that the remains were suddenly restored, revealing a enchanted item. By chance, the bead's magical effect was exactly what the party required to resolve another major story problem. It's impossible to plan these kinds of serendipitous moments.

Improving DM Agility

This incident led me to ponder if chance and making it up are in fact the beating heart of tabletop RPGs. Although you are a meticulously planning DM, your skill to pivot can rust. Players often excel at ignoring the most carefully laid plans. Therefore, a skilled DM must be able to adapt swiftly and invent content on the fly.

Employing luck rolls is a great way to train these abilities without going completely outside your usual style. The strategy is to apply them for small-scale circumstances that won't drastically alter the session's primary direction. As an example, I wouldn't use it to determine if the king's advisor is a secret enemy. Instead, I could use it to figure out whether the characters arrive just in time to see a critical event occurs.

Empowering Player Agency

This technique also serves to maintain tension and create the sensation that the adventure is alive, shaping in reaction to their actions in real-time. It combats the perception that they are merely characters in a pre-written story, thereby bolstering the collaborative foundation of roleplaying.

This philosophy has long been integral to the core of D&D. Original D&D were enamored with encounter generators, which fit a playstyle focused on exploration. While contemporary D&D often focuses on plot-driven play, leading many DMs to feel they need exhaustive notes, that may not be the required method.

Striking the Healthy Equilibrium

There is absolutely no problem with thorough preparation. Yet, there is also no problem with relinquishing control and allowing the rolls to guide minor details rather than you. Authority is a major part of a DM's responsibilities. We need it to run the game, yet we can be reluctant to release it, even when doing so could be beneficial.

A piece of suggestion is this: Have no fear of letting go of your plan. Experiment with a little randomness for inconsequential details. You might just discover that the organic story beat is infinitely more powerful than anything you could have pre-written in advance.