That's a 20th level epic boon (so very powerful)
The power of a permanent truesight effect would be situational. If you measure 'power' by raw combat ability, then unless you're fighting invisible creatures truesight has little effect. Even if this player is fighting invisible monsters, the rest of the party is still vulnerable. So it shouldn't break combat ...
As the DM, you can introduce whatever you want, including darkness that Darkvision doesn't see through. However, if you're looking for options that already exist within the rules, there are plenty.
The Darkness spell creates magical darkness that normal Darkvision does not see through.
The Fog Cloud spell creates magical fog that heavily obscures an area.
The range of Scrying is "self", so the caster targets him/herself first
The spellcasting rules says that the target must be withing range:
The target of a spell must be within the spell's range
However, range of Scrying is "self", so initially the caster is targeting self, not the creature he/she is scrying:
Interesting point regarding the description of darkvision on PHB p. 184. However, the Monster Manual on p. 9 says:
A monster with darkvision can see in the dark within a specific radius. The monster can see in dim light within the radius as if it were bright light, and in darkness as if it were dim light. The monster can't discern color ...
The light spell casts shadows to the same degree that any light source does.
Technically speaking, nothing in the game rules ever says shadows exist whatsoever. The rules for light producing items just say they throw a radius of light, and that light level exists everywhere in the radius. Nothing in the rules says that physical objects like dense foliage ...
You quoted all the relevant rules. To read lips, you need to
see a creature's mouth while it is speaking a language you understand
And with the Eagle totem at 6th level, you get to clearly see creatures and fine details (like moving lips) within 1 mile. It is legal and a great idea.
Regarding realism, as pointed out in the comments, it'...
It levels the playing field
Casting darkness will cancel out both advantage and disadvantage, due to the way they stack.
If your opponent has advantage and you have disadvantage, then cancelling both will be good for you, and bad for them.
It benefits those who can see through magical darkness
Some characters (eg, Warlocks with Devil's Sight) can see ...
Averting your eyes does exactly what it says it does: You willingly look away from your target.
Unless surprised, a creature can avert its eyes to avoid the saving
throw at the start of its turn. If the creature does so, it can't see
the medusa until the start of its next turn, when it can avert its
When you cannot see a target, you ...
I realized my comments were better suited as their own answer.
You are absolutely correct that a hooded lantern would be visible in the dark from any distance. Assuming you had direct line of sight on the lantern.
So if you are in an open empty field, or a very large open cavern, then you are right...there's no point to a hooded lantern.
However, you can ...
As there is no general rule, the best I can give is what I do.
Can you see the sun?
I rule that if the creature can see the (image of) the sun, they're in sunlight. How would this fit your examples? Reflections count if they're clear enough to see the image of the sun, so mirrors count, but a building or the moon would not. Wispy clouds would not block ...
Radiant damage, despite its name, is not damage caused by light.
Radiant damage simply happens to look like light. Look at the examples of radiant damage: a cleric's flame strike spell, or an angel's smiting weapon. Radiant damage is caused by holy power; the light is just a side effect.
Consider the 3.5e version of Flame Strike, which deals half fire ...
If you cannot see your opponent then you cannot use any spell or feature that says "that you can see".
For example, you cannot:
Use Protection fighting style.
Use Uncanny Dodge.
Make Opportunity Attacks.
Cast any spells that require a target you can see.
Your attack rolls will be at normal (the advantage for the target not seeing you is negated by the ...
You can see light at any range
I did some googling, and while it's pretty hard to find specific citations from scientific studies, the places that I've been able to find say that the human eye can see a candle from somewhere between 10 and 30 miles away. The curve of the Earth is about 3 miles away. Thus, any significant light is at least barely visible ...
Yes, that is the rules-as-written.
It's worth noting, additionally, that there's actually no need for the archer to step out of the fog cloud in most circumstances: despite being effectively blinded, per the rules of the game, a creature would still know the location of another creature they cannot see, so long as that creature does not take the Hide action ...
This is merely giving an unwilling creature a chance to not be affected by a spell.
It does not do anything special by default.
However, for some creatures, it may end up providing disadvantage. Many creatures who are native to dark areas do have disadvantage when they are in bright light.
It may also help if you are trying to remain hidden. If you are in ...
Would giving your players uncommon items break the game? No
The rules for this item exist, so you're not adding anything new to the game. Giving uncommon magic items at level 4 is not out of whack either. Mechanically, you're fine; this isn't going to break anything.
Compensate your elves
On the other hand, your elven players chose a race that gave them ...
Yes, but going by RAW you'd have to contest your own strength
The definition of "see" means you can visualise the target or include it in at least one of your sight senses; as the only thing blocking your normal sight is the blindfold, the blindfold is currently in your vision.
However, going by the rules as written, there's a hilarious wrinkle:
If the ...
If the Warlock is inside, NO. If they are outside, Maybe.
The real key here is the wording on Hunger of Hadar. The spell breaks itself down into being inside the sphere, and being on the outside looking in. We'll use that same breakdown as well.
A 20-foot-radius sphere of blackness and bitter cold appears, centered
on a point with ...
I play a human cleric in a party full of characters with darkvision. Granted, we don't find ourselves in pitch darkness all that often, but it happens enough.
Rather than find a way to level the playing field, I find that embracing this difference makes for some interesting narration and adventuring.
I have to trust at least one ...
Drow typically utilize magic in the following ways for illumination:
Specific Mention of the Forgotten Realms
That pillar is the Narbondel of Narbondellyn,
Menzoberranzan; which is illuminated in both visible and
infrared spectrums by the Archmage Gromph Baenre at the
start of each day.
General Information on Drow City Illumination
Various other books and ...
Blindsight (monster ability)
A creature with blindsight can perceive its surroundings
without relying on sight, within a specific radius.
Creatures without eyes, such as oozes, and creatures
with echolocation or heightened senses, such as bats
and true dragons, have this sense.
This isn't super helpful mechanically, however it does mention '...
Darkvision is unfortunately useless to a blind person. Weirdly, when a race gets Darkvision, it's described in that race's entry. But the Transmuter's Stone says this:
Darkvision out to a range of 60 feet, as described in chapter 8
So if we find the entry on Darkvision in chapter 8 (PHB, page 183):
Within a specified range, a creature with darkvision ...
The Special Sense Blindsense bypasses the mechanics of being Invisible
The Invisible condition states (emphasis mine):
An invisible creature is impossible to see without the aid of magic or a special sense.
Blindsight is a special type of sense, along with senses like True Sight and Tremorsense.
The condition explicitly calls out that there are ...
Unless the target is hiding from the Goblin, the Goblin will still be aware of which square the target is in, which means that they can still target that person. Because of the Blinded condition, the Goblin will be forced to attack with Disadvantage.
If the target is completely hidden (by making a Stealth check and beating the Goblin), then it will be ...
By RAW, the rogue can sneak attack as long as the target has an enemy within 5 ft of it
From the Rogue's Sneak attack:
You don’t need advantage on the attack roll if another enemy of the target is within 5 feet of it, that enemy isn’t incapacitated, and you don’t have disadvantage on the attack roll.
and from the Basic Rules(Emphasis Mine)
Well, if you don't mind making a pact with some powerful entity, you could get 2 levels of warlock. This will give you access to a few spells, some of which perhaps being interesting (both stats and flavor-wise) for your character. But most of all, this will give you access to 2 invocations.
One of these invocations should be Devil's Sight, which grants you ...
Yes, you can blind something with Truesight.
The only thing Truesight does in this case is magnify the ability that was lost to blindness:
Truesight enhances one's ability to see: through magical darkness, invisibility, illusions, shapechanges, and into the Ethereal (PHB p.185).
But the blindness condition now says "you can't see. The sight through ...
You are correct. If you were in total darkness, that would be equivalent to Dim Light/Lightly Obscured to a creature with Dark Vision. However, you would still have to make a stealth check to hide, as the wording is "You can try to hide..." (bold added for emphasis).
Hiding (PHB p. 177)
"When you try to hide, you make a Dexterity (Stealth) check...."