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As a DM, I usually steered clear of significant use of randomization during my Dungeons & Dragons sessions. My preference was for the plot and what happened in a game to be guided by player choice rather than the roll of a die. Recently, I chose to alter my method, and I'm truly glad I did.

The Spark: Observing a Custom Mechanic

An influential streamed game features a DM who regularly requests "chance rolls" from the players. This involves selecting a type of die and assigning consequences tied to the result. While it's at its core no distinct from using a pre-generated chart, these are created in the moment when a character's decision doesn't have a clear outcome.

I decided to try this technique at my own session, mostly because it seemed interesting and offered a departure from my normal practice. The outcome were eye-opening, prompting me to reconsider the perennial tension between pre-determination and randomization in a roleplaying game.

A Powerful In-Game Example

In a recent session, my group had just emerged from a large-scale fight. Afterwards, a cleric character inquired after two key NPCs—a sibling duo—had lived. Instead of deciding myself, I let the dice decide. I told the player to make a twenty-sided die roll. I defined the outcomes as: a low roll, both died; a middling roll, a single one would die; on a 10+, they both lived.

The player rolled a 4. This led to a profoundly poignant moment where the characters found the corpses of their allies, still holding hands in death. The party held a ceremony, which was especially significant due to previous character interactions. As a parting gesture, I improvised that the NPCs' bodies were strangely transformed, containing a spell-storing object. I randomized, the item's magical effect was exactly what the group required to solve another pressing quest obstacle. It's impossible to script this type of magical coincidences.

Sharpening DM Agility

This incident made me wonder if improvisation and spontaneity are actually the core of tabletop RPGs. Even if you are a prep-heavy DM, your skill to pivot can rust. Groups frequently take delight in derailing the most carefully laid plans. Therefore, a effective DM needs to be able to adapt swiftly and create details in the moment.

Using similar mechanics is a fantastic way to develop these skills without straying too much outside your usual style. The trick is to deploy them for minor situations that have a limited impact on the campaign's main plot. For instance, I would not employ it to decide if the main villain is a traitor. Instead, I would consider using it to figure out if the party reach a location just in time to see a critical event takes place.

Strengthening Player Agency

Spontaneous randomization also works to maintain tension and create the feeling that the adventure is alive, evolving according to their choices in real-time. It prevents the perception that they are merely characters in a DM's sole story, thereby strengthening the cooperative aspect of storytelling.

This approach has long been integral to the original design. Original D&D were reliant on charts, which fit a game focused on exploration. While current D&D often emphasizes story and character, leading many DMs to feel they require detailed plans, that may not be the required method.

Finding the Sweet Spot

It is perfectly no problem with being prepared. But, equally valid no problem with letting go and allowing the rolls to guide minor details in place of you. Direction is a significant factor in a DM's responsibilities. We require it to manage the world, yet we often struggle to cede it, even when doing so can lead to great moments.

The core advice is this: Do not fear of letting go of your plan. Experiment with a little chance for smaller story elements. It may find that the unexpected outcome is infinitely more rewarding than anything you could have scripted on your own.