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As a Dungeon Master, I historically shied away from extensive use of chance during my tabletop roleplaying sessions. My preference was for narrative flow and session development to be shaped by character actions rather than pure luck. That said, I decided to alter my method, and I'm very glad I did.

The Catalyst: Watching a Custom Mechanic

A popular podcast utilizes a DM who regularly requests "chance rolls" from the participants. The process entails choosing a type of die and outlining potential outcomes contingent on the result. While it's essentially no distinct from using a random table, these are created spontaneously when a character's decision lacks a predetermined conclusion.

I chose to experiment with this technique at my own session, primarily because it appeared novel and provided a change from my usual habits. The outcome were fantastic, prompting me to reflect on the often-debated dynamic between pre-determination and randomization in a tabletop session.

A Memorable Story Beat

During one session, my players had just emerged from a city-wide conflict. Later, a cleric character inquired after two friendly NPCs—a brother and sister—had made it. Instead of choosing an outcome, I handed it over to chance. I instructed the player to roll a d20. I defined the outcomes as: on a 1-4, both died; on a 5-9, only one succumbed; a high roll, they made it.

Fate decreed a 4. This led to a incredibly poignant moment where the characters found the bodies of their companions, forever united in their final moments. The group conducted funeral rites, which was especially significant due to earlier character interactions. As a final gesture, I chose that the forms were suddenly restored, revealing a spell-storing object. I rolled for, the bead's magical effect was perfectly what the party needed to address another critical story problem. One just orchestrate this type of magical coincidences.

Sharpening DM Agility

This experience made me wonder if randomization and thinking on your feet are actually the beating heart of D&D. Even if you are a prep-heavy DM, your improvisation muscles can rust. Groups often take delight in upending the best constructed narratives. Therefore, a skilled DM needs to be able to adapt swiftly and fabricate content in the moment.

Employing similar mechanics is a excellent way to practice these skills without straying too much outside your usual style. The key is to apply them for minor situations that won't drastically alter the session's primary direction. As an example, I would avoid using it to establish if the king's advisor is a secret enemy. But, I would consider using it to decide if the party arrive moments before a major incident takes place.

Enhancing Collaborative Storytelling

Luck rolls also works to make players feel invested and cultivate the feeling that the game world is dynamic, shaping according to their actions in real-time. It combats the sense that they are merely pawns in a pre-written narrative, thereby strengthening the cooperative foundation of the game.

This approach has always been part of the game's DNA. Early editions were enamored with encounter generators, which suited a game focused on treasure hunting. Although modern D&D often prioritizes narrative and role-play, leading many DMs to feel they require detailed plans, that may not be the only path.

Finding the Healthy Equilibrium

There is absolutely no problem with doing your prep. Yet, there is also nothing wrong with letting go and allowing the whim of chance to determine certain outcomes instead of you. Authority is a big aspect of a DM's responsibilities. We use it to run the game, yet we frequently find it hard to give some up, at times when doing so could be beneficial.

The core advice is this: Don't be afraid of temporarily losing the reins. Try a little improvisation for minor details. The result could discover that the unexpected outcome is far more powerful than anything you could have pre-written in advance.