24
It is not "explicitly forbidden", but...
Class features are, like answered by indigochild in the question you linked, not feats. That's as explicit as the book gets: there's no direct statement saying that one cannot take a class feature as a feat, probably because they are two distinct things and the authors of the sourcebooks didn't think they would need ...
20
It's against the rules
You're basically asking "Can my character fire lasers out of their eyes because it doesn't specifically say it is forbidden?", to which the answer is, of course, no. *
There are no rules that allow you to pick and choose features from other classes as feats, feats are not related to class features and you're entirely in homebrew ...
19
No
As an action, you can spend one use of a healer’s kit to tend to a creature and restore 1d6 + 4 hit points to it, plus additional hit points equal to the creature’s maximum number of Hit Dice. The creature can’t regain hit points from this feat again until it finishes a short or long rest.
Nowhere does it mention that the target needs to be immobile ...
16
You don't need the feat in 5E to wield oversized weapons
The DMG section on creating a monster provides rules for using oversized weapons under "Step 11. Damage" (p. 278; emphasis mine):
Big monsters typically wield oversized weapons that deal extra dice of damage on a hit. Double the weapon dice if the creature is Large, triple the weapon dice if it’s ...
15
It Seems Very Strong Compared to Magic Initiate
The closest PHB parallel to this feat would seem to be Magic Initiate, which allows knowing one 1st level spell to be cast once without a spell slot (unless you are certain classes and subclasses taking it for your own class). Invocations are somewhat comparable to knowing spells as many of them involve ...
10
You can't see the attack coming.
Unless you're in total cover inside impenetrable transparent windows (what are you riding, the Popemobile?), you can't see that your mount is getting attacked, so you can't do anything about it.
No, the feat doesn't say you have to see the attack coming. This is a corner case that the rules shouldn't be expected to address--...
9
Yes, that combo works
By the wording of Chaos Bolt:
The number rolled on that die determines the attack's damage type as shown below.
And as you quoted from the Elemental Adept feat:
In addition, when you roll damage for a spell you cast that deals damage of that type, you can treat any 1 on a damage die as a 2.
It does not say that you treat the 1 ...
9
The patient doesn't need to be immobile
Rules do what they say they do.
As an action, you can spend one use of a healer’s kit to tend to a creature and restore 1d6 + 4 hit points to it, plus additional hit points equal to the creature’s maximum number of Hit Dice. The creature can’t regain hit points from this feat again until it finishes a short or ...
9
You would have neither advantage nor disadvantage.
You have already quoted all relevant rules yourself except the following, which is taken from the section Advantage and Disadvantage on page 173 of the Player's Handbook:
If circumstances cause a roll to have both advantage and disadvantage, you are considered to have neither of them, and you roll one ...
8
I'm going to just go right out and say it: I don't like the wording of your question. I think it implies a bad precedent can have some dangerous (to game balance) implications.
"RAW is it against the rules to..." is not often followed by good intent. Not that I'm implying you have bad intent, merely an observed trend. The rules are both bounds for us to ...
7
The rider gets no benefits from total cover because a redirected attack is not a direct attack but an indirect one; alternatively, this is a case over specific over general
The rules on Cover state:
[...] A target with total cover can't be targeted directly by an attack or a spell, although some spells can reach such a target by including it in an area ...
6
That's what multiclassing is for
Unlike getting a feat, in order to get a class feature you must have an appropriate level of the appropriate class. Some features are quite powerful and require a lot of levels (like cleric's Divine Intervention), some are accessible from the 1st level.
The Unarmored Defense feature is a cheap(-ish) one — you have to take ...
6
There is no restriction to common or uncommon languages you have access to; the last clause is likely a reference to rare or secret language options.
Note that the player doesn’t have carte blanche here; a non-Druid could still not learn Druidic for example.
6
Interpreting strictly by the rules as written, I'd say you have to make the normal opportunity attack rather than casting the spell: War Caster is worded as being instead of the attack, as you noted, so if you make that choice you're not making the attack.
If instead of rules as written, you want to know how I'd actually rule this situation as a DM, I'd ...
6
If you haven't already, I'd recommend taking a look at the Unearthed Arcana that discusses feat-building. I'm not a fan of the feats in that particular article myself, but I do appreciate what it has to say on the design philosophy of feats.
That said, let's tackle your feat from a different perspective. As mentioned, determining balance just by looking ...
5
At first look, it look slightly unbalanced...
Looking at strictly PHB feats, all of the "half feats" (Where it's +1 to an ability score and some other boon) consist of the +1 and one other big boost; mostly proficiency of some kind. With the occasional fluff piece.
Examples of the single boost are
weapon proficiency
added languages
added skills
added hit ...
5
Both abilities trigger simultaneously
Parry says (emphasis added):
When another creature damages you with a melee attack, you can use your reaction and expend one superiority die to reduce the damage by the number you roll on your superiority die + your Dexterity modifier.
Arcane Ward says (again, emphasis added):
Whenever you take damage, the ward ...
5
You do not need Tavern Brawler
Improvised Weapon will let you wield a 2h sword in 1 hand:
An improvised weapon includes any object you can wield in one or two hands, such as broken glass, a table leg, a frying pan, a wagon wheel, or a dead goblin.
It goes without saying that a sword is an object.
4
The circumstances of the attack roll (including cover) are irrelevant in this case-- the rider does nothing to the attacker. The feat applies specific rules which override the general rules.
As Medix2 cited, the relevant rule about cover is
[...] A target with total cover can't be targeted directly by an attack or a spell, although some spells can reach ...
4
No, Dual Strike does not benefit from Vital Strike.
From the Dual Strike text (emphasis mine):
As a standard action, you can make two attacks, one with each weapon you’re wielding, applying the normal penalties for two-weapon fighting to each.
From the Vital Strike text (emphasis mine):
When you use the attack action, you can make one attack at your ...
3
The trip trait allows any item bonus that would be applied to attack rolls with your wolf jaw attacks to also apply to athletics checks to trip.
The trip trait reads (CRB p283):
You can use this weapon to Trip with the Athletics skill even if you don’t have a free hand. This uses the weapon’s reach (if different from your own) and adds the weapon’s item ...
3
The feat Sidestep (Miniatures Handbook 28) could render an attacker unable to attack a defender that possesses the feat Sidestep. However, the attacker would be unable to attack because the attacker exhausted its movement and can't reach the attacker rather than because the defender somehow caused the attacker to forfeit its remaining movement on account of ...
3
Most probably no
While Swarms "act" as a single creature, they are not "treated" as a single creature, except when the subtype mandates it: HD, HP, initiative, speed, AC and Saves.
As an exception to all these things where the swarm is treated as if it was a single creature, swarms are immune to any spell that targets a specific number of creatures. While ...
2
Technically, movement happens square-by-square. If something happens when you reach one square, that can change how you decide to spend the rest of your movement. So if you used Sidestep to avoid your attacker, but they still have sufficient movement to reach you, then they just have to keep moving towards you to make their attack. Even with Combat Reflexes, ...
2
No.
Augmented Elements states:
Benefit: You learn a simple blast from any element (including your primary element, if there is another blast for you to choose). Unless you later gain access to this blast through another method, you increase its burn cost by 1 whenever you use it. In addition, you gain the psionic subtype, allowing you to take psionic ...
2
Spiritual Weapon says:
When you cast the spell, you can make a melee spell attack [...]
There is the option to make an attack or not, so going by the wording of Spell Sniper, it shouldn't be affected by Spell Sniper because you are not "required to make an attack roll".
Bigby's Hand (Player's Handbook, p. 218) also includes the phrase
you can [...] ...
2
It works.
As you note, the Advanced Weapon Training feat says:
Special: Fighters that have the weapon master archetype can select this feat beginning at 4th level. The benefits of a weapon master’s advanced weapon training options apply only to his selected weapon rather than all weapons in the same fighter weapon group, and he can’t select the weapon ...
2
Having an antimagic field between you and a spellcaster does almost nothing for you—spells and spell areas can pass (suppressed) through the field to affect you on the other side. It does not break line of effect (or line of sight).
Do all spells targeting Jozan take effect?
Does Magic Missile or Ray of Enfeeblement or Streamers do damage?
What ...
2
The feat needs trimming before playtest
Based on the consensus in the three answers above, the feat will take this form.
Feat: Eldritch Adept
Prerequisite: Warlock level 4
1. Gain one invocation of your choice from those available to the Warlock, and for which you qualify.
2. Gain one additional cantrip from the Warlock spell list.
Note for ...
2
No.
In D&D 5e, there is no feat equivalent of the monkey grip feat. However, you can talk to you DM about being allowed to use a homebrew feat that is the equivalent of that feat.
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