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As a Dungeon Master, I traditionally steered clear of heavy use of luck during my Dungeons & Dragons games. I preferred was for story direction and session development to be guided by deliberate decisions instead of the roll of a die. However, I opted to change my approach, and I'm very glad I did.

The Inspiration: Seeing 'Luck Rolls'

An influential actual-play show features a DM who regularly asks for "chance rolls" from the adventurers. This involves selecting a polyhedral and defining consequences tied to the result. This is at its core no unlike rolling on a random table, these are devised on the spot when a player's action has no predetermined outcome.

I opted to test this technique at my own game, primarily because it appeared novel and presented a break from my normal practice. The outcome were fantastic, prompting me to reconsider the ongoing balance between preparation and randomization in a D&D campaign.

A Powerful In-Game Example

During one session, my group had concluded a city-wide fight. When the dust settled, a cleric character asked about two friendly NPCs—a sibling duo—had survived. In place of deciding myself, I handed it over to chance. I instructed the player to make a twenty-sided die roll. The stakes were: a low roll, both were killed; on a 5-9, only one would die; a high roll, they survived.

The player rolled a 4. This led to a deeply poignant scene where the adventurers found the corpses of their allies, forever holding hands in death. The cleric conducted last rites, which was especially powerful due to prior roleplaying. In a concluding touch, I improvised that the remains were miraculously transformed, showing a enchanted item. By chance, the item's contained spell was precisely what the party needed to address another critical situation. You simply script this type of serendipitous story beats.

Sharpening On-the-Spot Skills

This event led me to ponder if improvisation and spontaneity are in fact the beating heart of D&D. While you are a prep-heavy DM, your skill to pivot need exercise. Groups frequently take delight in ignoring the most carefully laid plans. Therefore, a good DM needs to be able to pivot effectively and invent details in the moment.

Employing similar mechanics is a fantastic way to develop these skills without straying too much outside your preparation. The key is to deploy them for minor circumstances that don't fundamentally change the campaign's main plot. To illustrate, I would avoid using it to establish if the main villain is a traitor. But, I could use it to figure out if the PCs enter a room just in time to see a major incident takes place.

Enhancing Player Agency

Luck rolls also works to keep players engaged and create the sensation that the adventure is responsive, shaping according to their actions in real-time. It prevents the perception that they are merely pawns in a pre-written narrative, thereby strengthening the cooperative foundation of the game.

Randomization has long been embedded in the game's DNA. The game's roots were filled with encounter generators, which made sense for a game focused on dungeon crawling. Even though modern D&D frequently emphasizes narrative and role-play, leading many DMs to feel they need exhaustive notes, that may not be the required method.

Finding the Healthy Equilibrium

It is perfectly no issue with doing your prep. But, it's also fine nothing wrong with relinquishing control and letting the whim of chance to determine certain outcomes rather than you. Control is a major part of a DM's job. We need it to manage the world, yet we frequently find it hard to cede it, at times when doing so might improve the game.

A piece of suggestion is this: Do not fear of relinquishing a bit of your plan. Try a little randomness for smaller story elements. You might just discover that the organic story beat is significantly more rewarding than anything you could have planned on your own.