They probably don't stretch
The name of the feature: "long-limbed" seems to merely be referring to the length of the arms themselves. If stretchiness was an aspect of bugbear physiology, that is something that would probably be mentioned in the description of bugbears either in the Monster Manual or Volo's Guide to Monsters.
Why only on the bugbear's turn ...
From logic, one would arrive at:
"Climbing for a thief no longer costs the thief extra movement,"
"Climbing for a centaur costs 4 extra feet,"
"4 extra feet is extra movement," (implied from "instead of the normal 1 extra foot")
(2&3) "Climbing for a centaur costs extra movement"
C. (1&4) "Climbing for a centaur thief would not cost any extra ...
As of the 2018 Errata, the Athlete feat has been changed
Athlete (p. 165). The third benefit should instead say climbing doesn't cost you extra movement.
—Errata: Player's Handbook, 2018
Because of this change, the Athlete feat would allow a Centaur to ignore all extra costs associated with climbing. The technicality of ignoring "halved" movement ...
The Direct Answer
The direct answer is yes, the DM can override racial traits and absolutely anything else they want to override.
Your Specific Situation
This would be an odd thing to override. First, most campaigns don't make a big issue out of food and water. They are often assumed to be adequately available so that it doesn't become much of a ...
Don't nerf the players, buff the challenges
If the entire party consists of kobolds, there is no reason to decrease their power level. Simply adjust the encounters to be a suitable challenge for the group. You can find guidance for adjusting the power level of encounters in many places, but in my experience, every group will need tinkering individually to ...
The way to reconcile these, IMHO, is to realise that the Thief ability is written assuming that the character is an ordinary humanoid biped. They would pay one extra foot of movement for each foot of climbing, and the ability removes that penalty.
So you could plausibly claim that a centaur Thief with Second-Story Work pays three extra feet of movement for ...
Your reasoning is correct
Indeed, Pack Tactics only requires that you have an ally within 5 feet of the target so this would work with any attack, including ranged spell or weapon attacks.
If the feature only worked for melee attacks it would say so, but it doesn't, so any attack works.
Yes. Both features are usable.
From wild shape:
You retain the benefit of any features from your class, race, or other source and can use them if the new form is physically capable of doing so.
The giant elk has hooves. The centuar racial feature requires hooves. It is reasonable to assume an elk can perform the charge racial feature ...
For your specific example, you simply gain the Light cantrip, there's no interaction as a result of the overlap. You wouldn't gain an additional cantrip of your choice, or any other effect.
For other feature interactions, it depends on whether the feature in question actually says anything about its interaction with other features. For example, Gloom ...
No, for two different reasons.
Most classes cannot replace cantrips at all. Even warlocks and sorcerers can only replace spells of a level for which they have spell slots, which excludes Cantrips since you don't have any 0th level slots.
But even if you could replace cantrips, as the Unearthed Arcana Artificer can, you still can't replace racial cantrips, ...
This feature is unbalanced for many campaigns and problematically unconventional
Assessing the balance of this feature is difficult as the situational value of flight, the main selling point of this feature, depends heavily on the type of campaign you have. If you have frequent rests, a character with this feature can spend almost all their combat time ...
You would gain no additional effect.
There is nothing in the spell's description that says you gain anything but 60 feet of darkvision. It is widely accepted that spells do only what they say they do.
Darkvision PHB p230:
You touch a willing creature to grant it the ability to see in the
dark. For the duration that creature has darkvision out to a ...
No, you only get the best one
From the Druid's Wild Shape feature:
You retain the benefit of any features from your class,
race, or other source and can use them if the new
form is physically capable of doing so.
Which (as the Elk form also has a charge feature) is quite clearly applicable. Therefore in Elk form the centaur feature is still ...
You can use your Bite with Martial Arts
This is how an unarmed strike is described:
Instead of using a weapon to make a melee weapon attack, you can use
an unarmed strike: a punch, kick, head-butt, or similar forceful blow
(PHB 195, errata v1.0)
It is clear that not only your hands can be used to make one, but any part of your body. The Bite ...
It's up to you as a player/DM
There is no description of how Long-Limbed works in-universe. It just does. As a player or DM, you are entirely free to describe what this looks like at your table as long as you use the existing mechanic of how it works.
That's the joy of roleplay!
The dangers of asking players to narrate abilities
I do want to put a ...
In the vast majority of cases, you double their lift/push/drag/carrying capacity
Size and Strength. Larger creatures can bear more weight, whereas Tiny creatures can carry less. For each size category above Medium, double the creature's carrying capacity and the amount it can push, drag, or lift. For a Tiny creature, halve these weights.
—Lifting and ...
Mordenkainen's Tome of Foes Eladrin
For the MtoF Eladrin, the relevant traits can be found on page 61 and 62. These include the fact that choosing a season is mandatory:
Choose your eladrin's season: autumn, winter, spring, or summer.
As you can see, there is no option for having no season. You simply have to choose one. Do note that you may be allowed ...
A variant human's starting feat and extra skill proficiency are racial traits, and are lost when reincarnated into another race.
The reincarnate spell description states, in part:
The reincarnated creature recalls its former life and experiences. It retains the capabilities it had in its original form, except it exchanges its original race for the new ...
Weapons are weapons
Natural weapons are weapons
They work with booming blade.
Unarmed strikes are not weapons even though they make melee weapon attacks
They do not work with booming blade.
For completeness ...
Simple Weapons are weapons, Martial weapons are weapons and Improvised weapons are weapons.
For the quoted racial features ...
Cat's claws ...
There is no language in the Aarakocra stat block that says they must have a hand or arm free in order to fly. They simply just have a fly speed.
Adding a rule that if they hold a shield, or possibly a weapon/focus/etc, then they won't be able to fly complicates the race and introduces rules and requirements that don't exist. This definitely nerfs a ...
RAW, it doesn't affect
While grappling and shoving are considered special melee attacks, they don't require attack rolls, they are a contest of ability checks. From Player's Handbook, page 195 (emphasis mine):
Using at least one free hand, you try to seize the target by making a grapple check instead of an attack roll: a Strength (Athletics) check ...
Unfortunately, you're going to have to ask DNDguide
While discovering 3rd party content can create new and interesting opportunities, there are issues that arise that only the content creator can answer - and this is one of them.
The race itself is not mechanically described with the standard 5e terminology. The use of the term ...
Yes, you have to choose one
You have to
Choose a tool you're proficient with
That doesn’t let you choose a type of tool, you have to choose a specific singular tool from the type. “Vehicles” isn’t singular any more than “musical instruments” is singular. “A rowboat” or “a bagpipe” are singular options.
Your integrated tool is the specific one ...
No, this won't work for several reasons
There are several problems here...
Qualith is not the written form of Deep Speech. Deep Speech does not have a written form. It is the only language listed in the PHB that lacks a script used to write it down (see PHB/Basic Rules Chapter 4). Qualith is a unique, written-only language only used or understood by Mind ...
Your Firbolg Druid cannot cast their racial Detect Magic as a ritual
The rules for ritual casting are given in the Spellcasting chapter of the basic rules:
Certain spells have a special tag: ritual. Such a spell can be cast following the normal rules for spellcasting, or the spell can be cast as a ritual. The ritual version of a spell takes 10 minutes ...
Only the Protector Aasimar have flight
The Radiant Soul feature of the Protector Aasimar offers 1 minute of flight at a flying speed of 30 per long rest. (Volo's Guide to Monsters, p. 105).
The Scourge Aasimar has a light / radiant-damage-causing racial effect (Radiant Consumption), and the Fallen Aasmiar have a fear effect (Necrotic Shroud) - their ...
RAW and RAT (rules as tweeted), yes, resistances are kept by a wildshaped Tiefling or similar
By using the answers to this question, it can be seen that any and all features that do not explicitly require a feature on the beast (such as Hellish Rebuke requiring a finger to point) are valid for transference.
There may also be circumstances where the feature ...
This is VERY overpowered
All of the features your race provides are among the strongest or at least medium level feats found among all races. (Potentially with a few exceptions.) This clearly makes your version of the Dragonborn race overpowered.
Comparison with Variant Human
Let's consider Horns and Gording Rush approximately worth a feat (Charger+Tavern ...
Yes, if the racial rule calls them weapons
As your other linked answer states, Unarmed Strikes do not work for Improved Divine Strike because the rules say Unarmed Strikes are not weapons:
Instead of using a weapon to make a melee weapon attack, you can use an unarmed strike: a punch, kick, head-butt, or similar forceful blow (none of which count as ...
The races in 5e are very closely balanced and you need to take into account what the race already has instead of darkvision when comparing it to other races with darkvision.
That being said, I personally don't think darkvision is all that useful and depending on your setting and what adventures you go on, it could easily never come into play. ...