Can a dryad charm a demon?

I have a concept that I want to use of a dryad soothing a demon, which shall be a demon’s past as their first step to redemption. So is there any way a demon/fiend be charmed by a dryad, if this could happen in the rules. If not is there a way to get around that problem? The fiend is a yochlol, which can’t return to their original plane, and is having an angry fit about it in a forest and destroying the forest with what they touch.

“Instinctive charm” timing question: can I use it after seeing the die roll?

Multiple abilities can be used “after seeing the roll, but before knowing whether it hits or misses” (examples: Cutting Words and Combat Inspiration).

However, in the case of the Enchantment Wizard’s level 6 ability Instinctive Charm, the text says that “you use this feature before knowing whether the attack hits or misses”. There is no mention of “seeing the roll”.

Do I get to see the attack roll before using Instinctive Charm?

Assuming I do get to see the roll and it is a critical hit (natural 20), can I still get to use Instinctive Charm? Or do I “know” the attack hits because it is a critical, and hence can’t use the ability?

Can a Vampire charm a blind person?

The wording of the Vampire’s charm action has me a bit confused on whether a blind person either gets no saving throw from it or can’t be charmed at all like this.

Here is the exact description:

Charm: The Vampire targets one humanoid it can see within 30 ft. of it. If the target can see the Vampire, the target must succeed on a DC 17 wisdom saving throw against this magic or be charmed by the Vampire.

Of course, this question is also relevant in case the Vampire is invisible or otherwise hidden in plain sight from a target with normal eyesight.

Can an intellect devourer be charmed by charm person?

The intellect devourer is a Tiny aberration, which would normally make it immune to the 1st level spell charm person, but when it successfully uses its Body Thief ability on a Medium humanoid:

The intellect devourer retains its Intelligence, Wisdom, and Charisma scores, as well as its understanding of Deep Speech, its telepathy, and its traits. It otherwise adopts the target’s statistics.

Does adopting the target’s statistics include the monster type changing from an aberration into a humanoid, which makes it vulnerable to charm person?

What happens when a charmed intellect devourer is Charisma (Persuasion) check’d into teleporting out of its host’s skull and it becomes a Tiny aberration again? Is it still charmed?

How does Charm Person work?

In a campaign I’ve been playing in, we’ve been having a real tough time deciding how powerful to make the first level Charm Person spell for Magic Users. We are playing Swords & Wizardry, a D&D 0e retroclone.

In S&W, it’s described this way:

If the spell succeeds (saving throw allowed), the unfortunate creature falls under the caster’s influence.

It’s the interpretation of that last word that we can’t agree on. Some in the group want to see it as just making the ensorcelled person feel that they are the caster’s best friend and would like to help them out if they can, but not so powerful as to make the target do anything they wouldn’t normally do.

Others in the group argue that such a reading makes the spell nearly useless because it does nothing more for the caster than what good role playing and a high charisma could accomplish. Instead, barring asking the target to do something like commit suicide, they should be compelled to do almost anything the MU asks.

Seems to me that the first reading makes the spell too weak, and second reading makes it too strong. It’s only a first level spell after all. To complicate things, S&W has a 3rd level spell called Suggestion that forces the target to carry out a hypnotic suggestion, but just the one task. AD&D has a similar spell, except at the 4th level. How is this different from Charm? Shouldn’t a higher level spell be much more powerful?

Has anyone else run into this dilemma? If so, how did you resolve it? Anyone have any thoughts about how to find a middle way? Thanks in advance for the help.

Origin of ‘Air-Breathing Mermaid Charm’

The ‘Air-Breathing Mermaid Charm’ is a useful descriptor for a certain kind of negligence in writing of RPG books, and particularly their rules. The usual explanation of the phenomenon is that a mermaid write-up says nothing about breathing (making it easy to assume that mermaids, being half-humanoid-half-fish, can breath both in air and water), and then later a Charm says that it enables air-breathing for mermaids.

But I would like to know whether this is an actual race in some of the books and an actual Charm, or is it a purely ‘fictional’ example that is very loosely based on various less catchy-sounding Charms in the game? If the former, what book(s) is the example from?

Does a succubus’ charm end when it dies?

The Succubus’ charm says that:

One humanoid The Fiend can see within 30 feet of it must succeed on a DC 15 Wisdom saving throw or be magically Charmed for 1 day. The Charmed target obeys the fiend’s verbal or telepathic commands. If the target suffers any harm or receives a suicidal Command, it can repeat the saving throw, ending the effect on a success. If the target successfully saves against the effect, or if the effect on it ends, the target is immune to this fiend’s Charm for the next 24 hours. The Fiend can have only one target Charmed at a time. If it charms another, the effect on the previous target ends.

So we know that the effect ends if the succubus charms another creature, and that the creature can re-attempt to make its saving throw if it takes damage or is given a suicidal command.

What happens if the succubus charms a creature, and then dies shortly after? Does the effect end, or does it continue until the creature takes damage or after 24 hours?

What is the extent of the commands a Cambion can issue through Fiendish Charm?

In the last session we played, our DM sent Cambions at us. One of them managed to land a Fiendish Charm on our Barbarian and commanded him to attack our Bard. The part of text about issuing commands is quite short and reads as follows:

The charmed target obeys the cambion’s spoken commands.

The DM said that the charmed target has to obey the commands “as best as he can”, thus the Barbarian proceeded to quite literally demolish our Bard with two (regular one + Extra Attack) greatsword attacks empowered with Great Weapon Figther, while raging. We felt kind of overwhelmed.

Is Fiendish Charm really that strong? Do you have to obey the issued commands with literally all you have, feats and other power-ups included?

Does applying a longer duration Charm effect extend the duration of Philter of Love’s love effect?

The item “Philter of Love”(DMG, p. 184) hast the following description:

The next time you see a creature within 10 minutes after drinking this philter, you become charmed by that creature for 1 hour. If the creature is of a species and gender you are normally attracted to, you regard it as your true love while you are charmed.

If the creature who was the first to be seen by the creature drinking the potion charmed the drinker, would the drinker continue to regard them as their true love while they are charmed? There’s no distinction that you must be charmed “in this manner” or by the effects of the potion.

So, would charming a creature affected by the Philter of Love extend the potion’s love effects for the duration of the charm?

Does trying to charm an uncharmable creature cost a spell slot?

I’m soon going to DM for the first time, we’ll be playing 5e. If my players try to charm a creature with a condition immunity to being charmed, will they still lose a spell slot? They are all first level so it feels a bit cruel to, but I’d like to hear other people’s opinions first, especially since I’ve never played before myself. Thanks in advance!