Yes, a tiefling can have two human parents
Borrowing from my question What's the difference between a Tiefling and a Cambion?
From Xanathar's Guide to Everything, we have this table on page 62:
1-4 Both parents were humans, their infernal heritage dormant until you came along.
5-6 One parent was a tiefling and ...
Jester's coloration is explained in the narrative.
Critical Role Spoilers:
Although Jester's mom is a (red-skinned) tiefling, her father is a
This lends her the blue color, as well as the decidedly non-tiefling resistance to cold damage, instead of fire damage.
Lillith is a bit less clear
No mention (to my knowledge) is made of Lillith's coloration. It is ...
The regenerate spell
The most straightforward RAW way of getting missing bodyparts back is to have somebody cast regenerate on you.
The target’s severed body members (fingers, legs, tails, and so on), if any, are restored after 2 minutes. If you have the severed part and hold it to the stump, the spell instantaneously causes the limb to knit to the stump.
The tiefling was born that way
According to the PHB, not all tieflings are red; quite the opposite, their skin might have "the full range of human coloration":
Their skin tones cover the full range of human coloration, but also include various shades of red.
5e low-level magic can only change your appearance temporarily, so it would be easier for you ...
In general: You're the DM...the rules and setting details exist to enable you and your friends to have a good time playing the game together. If there are things that you don't like, you are free to change them.
To this specifically, there are no mechanical features of the Tiefling tied to their tail--it's purely cosmetic. So there will be no change to ...
Your friend is right, mostly
I'm assuming a Zariel Tiefling.
Casting shillelagh on your quarterstaff changes its damage die to 1d8 and allows you to use CHA for attack and damage.
Casting searing smite at 2nd level means that the next melee weapon hit adds 2d6 fire damage (not 1d6 as in the question) to the initial hit, and the target takes 1d6 damage ...
No, because tieflings and aasimars are humanoids.
According to the basic rules, player races (such as tiefling or aasimar) are assumed to be humanoid.
Every character belongs to a race, one of the many intelligent humanoid species in the D&D world.
Humanoid is a separate creature type than fiend or celestial. There are no creatures with multiple ...
Warlocks with fiend pacts are mortals,1 and therefore do not have any relevance to any fiendish hierarchy—in life, anyway.
Fiend-pact warlocks are rather likely to find themselves on the Lower Planes after death, either because they actively enabled an evil entity to advance its aims on the material plane and thus are judged evil themselves, or because ...
Vulnerability and Resistance are not mutually exclusive so there is no general vs specific
The general/specific rule only applies when two rules couldn't occur simultaneously such as two things changing your Strength score, or one thing making you prone and the other explicitly making you not prone. However, with vulnerability and resistance, there is no ...
It is not known
I don't know if there is any in-universe explanation in the show but I found something in the Explorer's Guide to Wildemount's section on tieflings (emphasis mine):
Exandrian tieflings have a wide array of skin tones, all of them vibrant and colorful. The most common hue is a deep crimson, but shades of purple, blue, green, and even yellow ...
Tieflings were introduced for the 2e Planescape setting. While the original campaign setting does not give any detailed information about their appearance, The Planewalker's Handbook offers a table (page 80) for randomly generating tiefling characters and that table includes green, blue or red-tinted skin as possibilities. Yet no association is made about ...
That is indeed an official option present in the Sword Coast Adventurer's Guide.
SCAG pg 118
Winged. You have bat-like wings sprouting from your shoulder blades. You have a flying speed of 30 feet. This trait replaces the Infernal Legacy trait.
PHB pg 43
Infernal Legacy. You know the thaumaturgy cantrip. Once you reach 3rd level, you ...
A simple wooden/steel replacement would work out.
As @Theik already mentioned, Regenerate would grow it back entirely.
However, depending on how much money the character has, and whether they think having a fancy replacement horn would be acceptable (imagine if he could get one made out of mithral or adamantine), I could see it being a good roleplaying ...
A tiefling can become undead
A typical tiefling that possesses the type outsider and the subtype native can become an undead just like any other living creature can, respecting, of course, the existing rules. To be clear, such a tiefling's appropriate death by a bodak, wight, wraith, or shadow wouldn't create spawn as such spawn can only come from a ...
A dead tiefling can be raised as undead
Tieflings have the "Outsider" type:
Type: Tieflings are outsiders with the native subtype.
Normally, outsiders can't be raised:
Unlike most living creatures, an outsider does not have a dual nature—its soul and body form one unit. When an outsider is slain, no soul is set loose. Spells that restore souls to ...
These variant subraces are not connected to a specific campaign
Mordenkainen's Tome of Foes is not connected to any specific campaign, and the first few chapters are generic "global" changes (emphasis mine to draw attention to the generic language):
The first five chapters present material for a Dungeon Master to add depth to a campaign that ...
Resistance and vulnerability, while doing directly opposite things, aren't contradicting effects. They stack to a net zero effect (ignoring rounding).
This is similar to having advantage and disadvantage at the same time, or having both a +2 and -2 to a roll. Two effects interacting with the same thing is not necessarily a matter of specific versus general,...
While this is not established in 5E, old lore often carries through from older editions if it is not superseded by new lore. So, the only book I'm aware of that talks about Changeling reproduction is the 3.5E book Races of Eberron. From there, we get the following...
Two changeling parents breed a changeling child. A changeling and a humanoid can mate ...
There is a precedent for blue, and a stretch for white, neither with lore explanations
Sword Coast Adventurer's Guide (p. 118) mentions a variant of tiefling with dark blue-tinted skin:
Rather than having the physical characteristics described in the
Player's Handbook, choose 1d4+1 following features: small horns; fangs
or sharp teeth; a forked ...
Your question notes many sources accounting for tieflings with normal human skin tones as well as red, blue, and green tones, which covers most possible skin tones. I'm aware of the following other instances:
In the D&D 3e Lords of Darkness, p. 107, Kleb has pale white skin. I get the sense that this means actual white like paper, as opposed ...
The Blood of Fiends companion book states (page 10):
Most tieflings born into the Worldwound proper are enslaved or consumed, and those in surrounding lands are harried from hamlets and towns where they might otherwise live quietly, and generally head a little farther south or west each time to seek a place where they can hide themselves anew.
You can also ...
The Winged Tiefling is one of the Variants on the Tiefling race from SCAG; it has a 30-foot fly speed, always
The Sword Coast Adventurer's Guide has many different variants on the Player's Handbook's original races; this just means they are additional options and changes to the PHB version that a player may use (as always, with the GM's permission). The ...
The DnD world supports examples of various curses.
So your Tiefling could have came across a cursed artifact (either by stealing it, or receiving it, knowingly or not, as stolen property). It could have been a necklace, ring, knife, etc. Upon touching the object, it changed their skin tone as a punishment (to mark them as a thief).
Because the magic used ...
It depends on your campaign.
In a campaign with a lot of indoor combat (dungeon crawl, city-based, etc), it's mostly irrelevant. Occasionally the ceiling will be high enough to get you out of reach of melee opponents, or you'll bypass a trap by flying over it. More often, though, nowhere in the room will be safe, because the ceiling is low enough for a ...
Polymorph any object p323 of the core rulebook can turn any creature into another creature, including undead.
An alternative would be to have the character attempt to become a lich, however; there are no official rules for that. So you'd have to work it out with your gm.
Enlightened fist requires spells or spell-like abilities with an arcane caster level; you don’t have one of those. Spell-like abilities are not usually arcane (or divine); exceptions are noted explicitly, e.g. with the warlock’s invocations.
Furthermore, even if your caster level was arcane (or we were talking about another prestige class that didn’t specify ...
As some mechanical proof, I quickly found two examples of templates for undead creatures (the JuJu Zombie and Skeletal Champion), and both specify they can be applied to 'any corporeal creature (other than an undead)'. Outsiders are corporeal and living, and can therefore be at least these specific types of Undead.
The Mending cantrip.
IF you still happen to have your old horn, or are able to get it, the Mending cantrip description says it:
repairs a single break or tear in an object you touch, such as a
broken chain link, two halves of a broken key, a torn cloak, or a
leaking wineskin. As long as the break or tear is no larger than 1
foot in any dimension, you mend ...