Eventually, everyone who plays Dungeons & Dragons finds a place where rules seem to defy logic and common sense. These quirks tend to stem from three good reasons:
The D&D rules don’t attempt to cover every situation. Few players would want to grapple with so many rules, so the design brings a more compact set of rules that apply to most of what happens in a game. To make sense of unusual situations and corner cases, D&D relies on the judgement of dungeon masters.
Rarely, the designers wrote rules that failed to work as intended. Often when the rules as written serve well enough, the D&D team chooses not to tamper with the text.
The D&D rules accommodate a legacy of earlier editions spanning 40-some years of history.
I asked D&D enthusiasts to name the strangest quirks in the rules. This post lists some of the best answers. I skipped the part of D&D that most brazenly defies reality: The rules for damage and recovery. Those unrealistic hit points enable the games’ combat-intensive, dungeon-bashing style, so I count that absurdity as a feature. (See Why Gary Gygax Added Unrealistic Hit Points to D&D.) To learn to love hit points, just avoid asking questions. For example, I wish I could stop wondering how (#13) one healing potion completely cures a new adventurer while a legendary hero needs to guzzle 20 for a similar recovery.
12. Characters with the Lucky feat can close their eyes, swing blindly at a foe, and gain a better chance of hitting than they would get from attacking as normal. When you use Lucky, you roll an extra d20 and choose your attack roll from any of the d20s you rolled. When you roll at disadvantage, you roll two d20s. So Lucky lets you choose your best roll from any of the three dice: the two dice rolled for disadvantage and the one for lucky. Use the force, indeed!
11. In one round, someone who flees a Wall of Fire, and then gets forced back in on another character’s turn takes more damage than someone who just stayed in the flames through the entire round. (See D&D’s Inconspicuous Phrases That You Notice Once You Master the Rules.)
10. Archers shooting blindly into impenetrable fog hit as easily as they do when they see their targets. A blinded attacker suffers disadvantage and typically gains advantage because their target can’t see the strikes to defend. Advantage and disadvantage cancel, so the attacks roll as normal. This makes some sense for melee attackers flailing in the dark. For someone shooting blindly, the lack of a to-hit penalty flouts common sense.
9. Daylight fails to generate sunlight. Daylight originated from the first-edition spell Continual Light. Back then, every new D&D player counted themselves as the first to realize a 2nd-level spell enabled them to easily destroy vampires! They were wrong. Then, as now, you don’t become a D&D designer without being pedantic enough to rule that light “as bright as full daylight” falls short of “direct sunlight.”
8. The Chill Touch cantrip isn’t a touch spell and doesn’t deal cold damage. In past editions, the spell really had a range of touch, but even then, its damage came from negative energy, the necromantic damage of the era.
7. Faerie Fire doesn’t deal fire damage or involve fairies. The spell references naturally glowing fungus.
6. Detect Evil and Good doesn’t detect evil and good. The spell’s name comes from past editions when it worked as described. Back then, too many players took shortcuts through adventures by detecting for evil and murdering potential villains in the first scene. Now the spell detects the creature types that are supernatural representatives of good and evil.
5. Only crossbow experts and sharpshooters can attack with a net without suffering disadvantage. Nets are ranged weapons with a normal range of 5 feet, so most net attackers must either make a ranged attack within 5 feet of a foe or at long range. Either way, the attack suffers disadvantage. Crossbow experts can make ranged attacks within 5 feet of a foe without disadvantage. Sharpshooters can make ranged attacks beyond normal range without suffering disadvantage.
4. Invisibility, a spell that makes you invisible and monitors your movements to see if you intended to hurt someone, rates as simpler than Greater Invisibility, a spell that just makes you invisible.
3. Creatures who lose temporary hit points to caltrops can have full health and still move slower. Worse, they can’t regain their speed until they take more damage. The speed penalty from caltrops only ends when you regain a hit point, so you might need to lose more hit points to have some to heal.
2. A cleric can cast a spell like Aid with somatic and material components while holding both a mace and a shield with a holy symbol. But casting a spell like Cure Wounds that drops the need for material components requires putting the mace or shield away. Fewer components makes the spell more cumbersome because the shield only doubles as a somatic component when you also use it as a spell focus to satisfy a need for material components. Confusing? Awkward? That’s why I’ve never seen this rule enforced. (See the Sage Advice Compendium.)
1. By relaying an object from creature to creature on consecutive turns in a 6-second round, a group can make the object outrace a jet. In an actual fight, everyone acts at the same time. But in the game, turns serve as a simple but unrealistic way to make sense of 6 seconds. To squeeze turns until their absurdity shows, just have everyone on the party run a relay. If each of 7 characters dashes 60 feet before passing a baton to the next person, the baton travels at almost 50 miles per hour. The more characters who can move an object in a round, the faster it goes. To weaponize this quirk, hire 1000 laborers to pass a 10-foot pole and create a peasant railgun. No DM allows such weapons, but some encounters force players to transport things like potions or keys across the battlefield. DM Tom Christy enforces a house rule where no object can be manipulated by more than one of each type of action in a round. No chaining move actions to rocket something across the battlefield.
All this points to the importance of the DM. D&D designer Dan Dillon writes, “If a confluence of circumstances in D&D creates rules interactions that don’t make sense to you, ignore it. Change it. Do what makes sense for the given situation the characters find themselves in.”
For example, if you prefer a game where shooting into darkness yields disadvantage, impose it. If you want Lucky characters to always suffer a disadvantage from disadvantage, then tweak the rule. Lead rules designer Jeremy Crawford suggests letting the lucky character choose between either (a) the lower of the two disadvantage dice or (b) the lucky die.
“The rules aren’t written to cover every possible circumstance,” continues Dan Dillon. “Think about how many pages would have to be added to the already 316-page Player’s Handbook if we added every possible ‘unless’ to a rule that applies advantage or disadvantage to an attack roll.”
The designers could try to patch every quirk and corner case, but if they did, you wouldn’t want to play that game.