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As a Dungeon Master, I traditionally shied away from heavy use of luck during my D&D sessions. I preferred was for the plot and session development to be shaped by character actions rather than pure luck. However, I chose to try something different, and I'm very happy with the result.

The Spark: Seeing a Custom Mechanic

An influential streamed game utilizes a DM who often calls for "chance rolls" from the adventurers. He does this by selecting a polyhedral and assigning potential outcomes tied to the number. This is at its core no distinct from rolling on a pre-generated chart, these are created on the spot when a player's action lacks a obvious resolution.

I chose to experiment with this approach at my own table, mostly because it looked interesting and presented a break from my standard routine. The results were eye-opening, prompting me to think deeply about the often-debated dynamic between pre-determination and improvisation in a roleplaying game.

A Powerful Story Beat

In a recent session, my party had survived a large-scale fight. When the dust settled, a player inquired after two key NPCs—a brother and sister—had made it. In place of deciding myself, I let the dice decide. I instructed the player to roll a d20. The possible results were: on a 1-4, both were killed; a middling roll, only one succumbed; on a 10+, they made it.

The player rolled a 4. This triggered a profoundly moving sequence where the characters found the corpses of their companions, still clasped together in death. The cleric performed funeral rites, which was especially powerful due to earlier roleplaying. As a final touch, I chose that the forms were strangely transformed, revealing a magical Prayer Bead. I rolled for, the item's magical effect was exactly what the group required to resolve another major situation. It's impossible to plan these kinds of serendipitous moments.

Improving On-the-Spot Skills

This experience made me wonder if chance and making it up are in fact the beating heart of this game. Even if you are a prep-heavy DM, your improvisation muscles can rust. Players reliably find joy in upending the most carefully laid plots. Therefore, a good DM has to be able to adapt swiftly and invent details in real-time.

Using on-the-spot randomization is a great way to develop these talents without venturing too far outside your comfort zone. The strategy is to apply them for small-scale situations that have a limited impact on the session's primary direction. As an example, I wouldn't use it to establish if the main villain is a traitor. But, I might use it to decide whether the PCs arrive moments before a major incident unfolds.

Empowering Collaborative Storytelling

This technique also serves to make players feel invested and cultivate the feeling that the game world is dynamic, progressing in reaction to their actions immediately. It reduces the perception that they are merely characters in a pre-written story, thereby strengthening the collaborative foundation of storytelling.

Randomization has always been part of the original design. The game's roots were enamored with charts, which fit a game focused on exploration. While current D&D often emphasizes narrative and role-play, leading many DMs to feel they need exhaustive notes, this isn't always the only path.

Achieving the Healthy Equilibrium

There is absolutely no problem with being prepared. Yet, there is also no problem with letting go and allowing the dice to decide some things rather than you. Control is a significant aspect of a DM's role. We use it to manage the world, yet we often struggle to give some up, at times when doing so could be beneficial.

My final recommendation is this: Do not fear of letting go of your plan. Embrace a little improvisation for smaller story elements. It may create that the unexpected outcome is infinitely more memorable than anything you could have pre-written on your own.