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In my role as a DM, I usually shied away from significant use of randomization during my tabletop roleplaying games. My preference was for the plot and what happened in a game to be guided by deliberate decisions as opposed to random chance. That said, I decided to change my approach, and I'm very glad I did.

The Catalyst: Observing a Custom Mechanic

A popular actual-play show utilizes a DM who frequently requests "luck rolls" from the participants. He does this by picking a polyhedral and assigning possible results based on the number. While it's at its core no different from consulting a pre-generated chart, these are created in the moment when a player's action doesn't have a obvious resolution.

I opted to test this method at my own table, primarily because it looked interesting and presented a change from my usual habits. The outcome were remarkable, prompting me to reflect on the often-debated tension between pre-determination and spontaneity in a D&D campaign.

An Emotional Story Beat

At a session, my players had survived a city-wide fight. Later, a cleric character asked about two friendly NPCs—a sibling duo—had made it. Instead of deciding myself, I let the dice decide. I asked the player to make a twenty-sided die roll. I defined the outcomes as: a low roll, both would perish; on a 5-9, a single one succumbed; a high roll, they made it.

Fate decreed a 4. This resulted in a deeply emotional scene where the party discovered the remains of their companions, still clasped together in death. The group performed a ceremony, which was especially powerful due to earlier character interactions. As a final gesture, I improvised that the forms were strangely restored, containing a enchanted item. By chance, the item's contained spell was exactly what the party needed to address another major quest obstacle. One just plan such magical story beats.

Improving Your Improvisation

This event made me wonder if chance and making it up are in fact the core of tabletop RPGs. Even if you are a prep-heavy DM, your skill to pivot need exercise. Groups reliably find joy in upending the best constructed plans. Therefore, a good DM has to be able to pivot effectively and fabricate content in the moment.

Utilizing similar mechanics is a great way to train these skills without straying too much outside your usual style. The trick is to apply them for small-scale decisions that don't fundamentally change the overarching story. To illustrate, I wouldn't use it to establish if the central plot figure is a secret enemy. Instead, I could use it to figure out whether the PCs enter a room moments before a critical event occurs.

Empowering Shared Narrative

Luck rolls also serves to keep players engaged and foster the feeling that the game world is dynamic, evolving in reaction to their actions immediately. It reduces the feeling that they are merely pawns in a rigidly planned story, thereby bolstering the collaborative aspect of storytelling.

This philosophy has long been embedded in the core of D&D. Original D&D were reliant on random tables, which made sense for a game focused on exploration. Although modern D&D often emphasizes plot-driven play, leading many DMs to feel they require detailed plans, it's not necessarily the only path.

Finding the Sweet Spot

Absolutely no problem with being prepared. However, there is also no problem with stepping back and allowing the dice to guide minor details instead of you. Direction is a significant factor in a DM's role. We require it to manage the world, yet we frequently find it hard to cede it, at times when doing so could be beneficial.

My final advice is this: Don't be afraid of temporarily losing your plan. Try a little improvisation for inconsequential story elements. The result could discover that the organic story beat is infinitely more powerful than anything you might have pre-written by yourself.