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When I am a Dungeon Master, I traditionally shied away from extensive use of chance during my tabletop roleplaying games. I preferred was for the plot and session development to be guided by deliberate decisions rather than random chance. However, I decided to change my approach, and I'm incredibly happy with the result.

The Catalyst: Watching a Custom Mechanic

A popular streamed game features a DM who often asks for "luck rolls" from the participants. He does this by selecting a type of die and outlining consequences tied to the roll. While it's essentially no different from rolling on a pre-generated chart, these get invented in the moment when a character's decision doesn't have a obvious conclusion.

I opted to test this technique at my own session, mostly because it seemed engaging and provided a break from my usual habits. The outcome were eye-opening, prompting me to think deeply about the perennial balance between planning and spontaneity in a tabletop session.

A Powerful In-Game Example

At a session, my party had survived a large-scale battle. When the dust settled, a cleric character inquired after two beloved NPCs—a sibling duo—had made it. Instead of picking a fate, I let the dice decide. I instructed the player to roll a d20. The possible results were: a low roll, both would perish; a middling roll, a single one succumbed; a high roll, they made it.

Fate decreed a 4. This resulted in a incredibly moving moment where the party found the corpses of their allies, forever united in death. The cleric performed a ceremony, which was particularly powerful due to prior character interactions. As a parting gesture, I improvised that the remains were suddenly transformed, revealing a magical Prayer Bead. I randomized, the bead's contained spell was exactly what the group needed to address another critical story problem. You simply script these kinds of serendipitous story beats.

Honing On-the-Spot Skills

This incident led me to ponder if chance and thinking on your feet are actually the essence of D&D. While you are a meticulously planning DM, your improvisation muscles need exercise. Adventurers reliably find joy in upending the most detailed narratives. Therefore, a effective DM has to be able to pivot effectively and create details in the moment.

Employing on-the-spot randomization is a great way to practice these skills without venturing too far outside your usual style. The strategy is to deploy them for small-scale circumstances that don't fundamentally change the overarching story. For instance, I would not employ it to determine if the main villain is a secret enemy. Instead, I might use it to decide whether the characters reach a location moments before a major incident occurs.

Strengthening Player Agency

Spontaneous randomization also works to make players feel invested and cultivate the feeling that the story is responsive, progressing based on their actions in real-time. It reduces the perception that they are merely pawns in a pre-written script, thereby strengthening the collaborative nature of the game.

This philosophy has always been embedded in the game's DNA. Early editions were filled with random tables, which fit a playstyle focused on exploration. While contemporary D&D frequently emphasizes plot-driven play, leading many DMs to feel they must prep extensively, it's not necessarily the required method.

Finding the Right Balance

It is perfectly no problem with thorough preparation. But, there is also no issue with stepping back and letting the whim of chance to guide minor details in place of you. Direction is a major factor in a DM's role. We need it to run the game, yet we often struggle to release it, even when doing so might improve the game.

My final suggestion is this: Do not fear of letting go of the reins. Embrace a little randomness for minor outcomes. It may create that the surprising result is far more rewarding than anything you could have pre-written on your own.