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As a DM, I historically avoided extensive use of chance during my D&D sessions. I preferred was for narrative flow and what happened in a game to be shaped by deliberate decisions rather than pure luck. Recently, I opted to alter my method, and I'm truly pleased with the outcome.

The Spark: Seeing a Custom Mechanic

An influential actual-play show showcases a DM who often asks for "luck rolls" from the players. This involves picking a polyhedral and defining consequences contingent on the number. While it's at its core no unlike using a pre-generated chart, these get invented on the spot when a player's action has no predetermined resolution.

I chose to experiment with this approach at my own game, mainly because it seemed interesting and presented a change from my standard routine. The results were fantastic, prompting me to think deeply about the often-debated dynamic between preparation and randomization in a roleplaying game.

An Emotional Story Beat

During one session, my party had just emerged from a massive battle. Afterwards, a cleric character wondered if two beloved NPCs—a sibling duo—had made it. Instead of picking a fate, I let the dice decide. I told the player to roll a d20. The stakes were: on a 1-4, both were killed; on a 5-9, only one would die; a high roll, they made it.

The player rolled a 4. This triggered a incredibly poignant scene where the adventurers came upon the corpses of their allies, forever holding hands in their final moments. The cleric conducted funeral rites, which was especially powerful due to previous character interactions. As a parting reward, I improvised that the forms were strangely restored, containing a magical Prayer Bead. I rolled for, the item's magical effect was perfectly what the party needed to solve another pressing quest obstacle. It's impossible to script such serendipitous story beats.

Improving On-the-Spot Skills

This incident led me to ponder if chance and thinking on your feet are in fact the essence of tabletop RPGs. While you are a prep-heavy DM, your skill to pivot need exercise. Adventurers reliably find joy in ignoring the most carefully laid narratives. Therefore, a effective DM has to be able to adapt swiftly and fabricate scenarios on the fly.

Using luck rolls is a great way to train these talents without going completely outside your usual style. The strategy is to apply them for small-scale circumstances that won't drastically alter the campaign's main plot. To illustrate, I would avoid using it to decide if the main villain is a secret enemy. However, I might use it to determine whether the characters enter a room just in time to see a major incident occurs.

Empowering Shared Narrative

Luck rolls also helps keep players engaged and cultivate the feeling that the story is responsive, evolving in reaction to their actions as they play. It combats the sense that they are merely characters in a DM's sole story, thereby bolstering the shared foundation of storytelling.

This approach has always been part of the game's DNA. The game's roots were reliant on random tables, which fit a playstyle focused on treasure hunting. Even though current D&D frequently emphasizes plot-driven play, leading many DMs to feel they must prep extensively, that may not be the required method.

Achieving the Right Balance

There is absolutely no problem with doing your prep. Yet, it's also fine no issue with stepping back and allowing the rolls to guide minor details in place of you. Direction is a major part of a DM's role. We require it to run the game, yet we frequently find it hard to give some up, at times when doing so could be beneficial.

My final suggestion is this: Don't be afraid of relinquishing a bit of your plan. Experiment with a little randomness for inconsequential story elements. The result could discover that the organic story beat is significantly more memorable than anything you might have planned in advance.