D&D 5E What Rules do you see people mistake or misapply?

[Iraelaemei]

Rogues and monks can dash twice.

Are you saying that they can't? They can, just some people do not add up the speed gained correctly. You aren't doubling your movement 2 times, you are being able to effectively 'use your movement' 3 times with the movement, action to dash, and cunning action/ki point bonus action movement.

 

[mach1.9pants]

That +10 things article is pretty poor, it has errors. The most glaring is the Magic Missile vs concentration. That's one check as it is one source of damage, not one per missile.

 

[Valmarius]

The divination wizard's Portent use must be declared before a roll is made. The previously rolled Portent number becomes the result of that roll, and no dice are used.

 

[iserith]

To be fair, that's not at all clear without the Sage Advice ruling. Drinking a flask of water is absolutely covered by the Use an Object action, so it's perfectly natural to assume that drinking a potion of healing should be no different. There's certainly no in-game reason for that to be the case, and, frankly, given the power level of potions in the game it's really not a restriction that I would consider beneficial to retain. It's not at all clear that the individual rules for each magic item type or each individual magic item description are providing explicit exceptions to the normal combat action rules. If Mearls and Crawford had wanted the game to work this way, they should have added a Use a Magic Item action to the list in the PHB.

I've heard some DMs in popular actual plays use that house rule, so I imagine that has something to do with the instances I've seen as well.

 

[Jefe Bergenstein]

You know the exact location of an invisible creature until said creature takes the Hide action and beats your passive perception.

You can only make opportunity attacks against a creature that you can see.


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Yeah, that's more a case of "rules the designers got wrong".

"You walk into a room. There is an invisible stalker standing motionless and silent in the corner" sounds pretty ing stupid...

 

[robus]

This seems like a risky proposition. Is there unhappiness among the attendees that things arent fully aligned well th the rules or is a personal peeve?

If there's unhappiness then sure, in a community minded spirit you can try to correct some egregious issues (and i guess nominate yourself as the rules guru . But if no one is complaining then what does it serve? It's a game, people are having fun. If it suddenly starts to feel like the DMs are being judged then there might be drop off in volunteers.

I'm sure it'll be fine but it feels like someone is grumpy because others are "doing it wrong". The rules are complex and seemingly endless so it's not surprising that people get it wrong. I think it's great that attendance is booming and new DMs are trying their hand. Perhaps we can relax a bit ?

 

[Pathkeeper24601]

Yeah, that's more a case of "rules the designers got wrong".

"You walk into a room. There is an invisible stalker standing motionless and silent in the corner" sounds pretty ing stupid...

It would not be unreasonable for the DM to rule that the Invisible Stalker (or some other creature made invisible at some time prior to the character entering the room) made a Stealth check before anyone even entered the room or gets Passive Stealth (continually make a Stealth action over a period of time). The rule being quoted generally assumes a combat situation where the PC/NPC's already noticed the invisible creatures and will notice the small clues of movement.

 

[Oofta]

It would not be unreasonable for the DM to rule that the Invisible Stalker (or some other creature made invisible at some time prior to the character entering the room) made a Stealth check before anyone even entered the room or gets Passive Stealth (continually make a Stealth action over a period of time). The rule being quoted generally assumes a combat situation where the PC/NPC's already noticed the invisible creatures and will notice the small clues of movement.

I don't know where the "PCs know where you are if you haven't taken the hide action even though you are invisible" comes from. Jeremy Crawford just clarified in a podcast that it's not true, nor is it the intent. There's a thread on it right here

If the invisible stalker is singing a bawdy tavern tune you probably know where it is. But sitting in the corner quietly? It's a DMs call, and normally will not be noticed.

 

[Kobold Stew]

8. Darkvision only changes darkness to dim light.

9. Dim light grants disadvantage to Perception checks (and passive Perception).

This. Even when the rule is known it is seldom applied.

 

[SubDude]

This seems like a risky proposition. Is there unhappiness among the attendees that things arent fully aligned well th the rules or is a personal peeve?

If there's unhappiness then sure, in a community minded spirit you can try to correct some egregious issues (and i guess nominate yourself as the rules guru . But if no one is complaining then what does it serve? It's a game, people are having fun. If it suddenly starts to feel like the DMs are being judged then there might be drop off in volunteers.

I'm sure it'll be fine but it feels like someone is grumpy because others are "doing it wrong". The rules are complex and seemingly endless so it's not surprising that people get it wrong. I think it's great that attendance is booming and new DMs are trying their hand. Perhaps we can relax a bit ?

Point taken. I shall definitely tread lightly.