Can a Changeling with the actor feat have permanent advantage and performance and Deception checks?

So the changeling’s shapeshift ability says that

As an action, you can change your appearance and your voice. You determine the specifics of the changes, including your coloration, hair length, sex, height and weight. You can make yourself appear as a member of another race, though none of your game statistics change. You can’t duplicate the appearance of a creature you’ve never seen, and you must adopt a form that has the same basic arrangement of limbs that you have. Your clothing and equipment aren’t changed by this trait.

So basically, as long as the person you are changing into is/ was a real person, you are always passing yourself off as a different person.

The Actor feat says

You gain +1 CHA, you have advantage on Deception and Performance checks when trying to pass yourself off as a different person, and you can mimic the speech of another person or the sounds made by other creatures that you have heard (for at least 1 minute).

So the way I read it, a changeling would always have advantage on Deception and Performance checks because they are always trying to pass themselves as a different person. Or is the meaning of the Actor feat that they only have advantage when they are trying to prove that they are a different person not in other situations? Really curious if this is kinda broken because a bard or rogue with expertise and advantage on all deception checks could be a crazy good liar.

What is the meaning of ‘permanent’ in description of True Polymorph?

Following on from this question: Can I True Polymorph a goblin into adamantine (and then forge him into a sword?)

Casting True Polymorph on an unwilling creature (relevant parts included only):

You transform the creature into a different creature…or into an object.The transformation lasts for the duration, or until the target drops to O hit points or dies. If you concentrate on this spell for the full hour, the transformation becomes permanent. An unwilling creature can make a Wisdom saving throw, and if it succeeds, it isn’t affected by this spell.

Creature into Creature: The target assumes the hit points of its new form, and when it reverts to its normal form, the creature returns to the number of hit points it had before it transformed. If it reverts as a result of dropping to O hit points, any excess damage carries over to its normal form. As long as the excess damage doesn’t reduce the creature’s normal form to O hit points, it isn’t knocked unconscious.

Creature into Object: If you turn a creature into an object, it transforms along with whatever it is wearing and carrying into that form. The creature’s statistics become those of the object, and the creature has no memory of time spent in this form, after the spell ends and it returns to its normal form.

The consensus seems to be that if the creature fails the Wisdom save, you can transform it into a weak creature like a slug or an object like a cup, and can then wait for 61 minutes concentrating on the spell, then stamp on the item and kill it, permanently, because that was its new permanent form. But this seems terribly unbalanced, requiring a single wisdom save to be failed (and these can be influenced with features such as Heightened Spell and Magical Ambush) to kill any creature which can be polymorphed, no matter its stats. This also seems to make True Polymorph a better version of Power Word Kill (if delayed and requiring a save) since it is completely uncapped by health, only by Wisdom save proficiency, as well as including many other functions. This makes it seem unlikely this is the correct interpretation of True Polymorph since it renders another (already weak, for that level) spell almost entirely pointless.

I presumed the spell to be saying that after one hour of concentrating on it, the polymorphed form no longer needs to be concentrated on and could last forever, but will still revert back to the original form if reduced to 0 HP, as described in the linked question where the creature (polymorphed into crafting materials) was cut apart. This seems to make much more sense and retains balance.

Which interpretation is correct? Does the ‘permanent’ section overrule the ‘transforms back if reduced to 0 hit points’ part?

Is it possible to get a permanent skeleton companion?

This is a follow up question to Can I make a skeleton from a zombie?

In D&D 5e, there are very few ways to get a permanent necrotic follower. Usually you have to reassert control over them. Finger of death, I think, is the only way to get a permanent undead follower, but I am pretty sure that only applies to zombies, as cited below.

A humanoid killed by this spell rises at the start of your next turn as a zombie that is permanently under your command

I am interested in the exhaustion immunity of skeletons, and enjoy their appearance much more than the zombies.

Is it possible to get a permanent skeleton companion?

What’s the dispel DC for a spell made permanent by another caster?

I am level 9 and I cast an Enlarge Person spell on myself.

An NPC is level 16 and casts Permanency on that Enlarge Person effect to make me larger permanently.

When an enemy later attempts to dispel the Enlarge Person effect, does the enemy roll against the caster level of me as the caster of Enlarge Person or the NPC’s as the caster of Permanency?

Deriving the Time Complexity of Ryser’s Algorithm for Evaluating the Permanent of a Matrix

Ryser has shown that the permanent of an $ n \times n$ matrix $ A=(a_{ij})$ can be expressed as

\begin{align} Perm(A) = (-1)^n \sum_{s \subset [n]} (-1)^{|s|} \prod_{i=1}^n \sum_{j \in s} a_{ij}, \end{align}

where $ [n]=\{1,2,\dots,n\}$ . This algorithm runs in $ \mathcal{O}(2^{n-1}n^2)$ time. I’ve been trying to derive this, but can’t quite get the result. Here’s my work so far.

The outer sum is over all non-empty subsets of $ [n]$ , of which there are $ 2^n-1$ . We recall that the number of subsets of size $ r$ is $ {n \choose r}=\frac{n!}{r!(n-r)!}$ .

For each set $ s$ in the outer sum we compute $ \sum_{j \in s} a_{ij}$ , which uses $ |s|-1$ additions. Next, this sum sees the product $ \prod_{i=1}^n$ , which takes $ n-1$ multiplications. This happens for each non-empty subset of $ [n]$ , so there are the following number of total additions:

\begin{align} \sum_{s \subset [n]} \left(|s|-1\right) &= \sum_{k=1}^n (k-1) {n \choose k} \ &= \sum_{k=1}^n k {n \choose k} – \sum_{k=1}^n {n \choose k} \ &= n \sum_{k=1}^n {n-1 \choose k-1} – \left(2^n – 1\right) \ &= n \left( 2^{n-1}-1 \right) – \left(2^n – 1\right) \ &=n2^{n-1} – 2^n -n +1. \end{align}

The total number of multiplications is $ (n-1)(2^n-1)$ .

There is also the $ (-1)^{|s|}$ , which takes another $ 2^n-1$ operations in total.

This gives us a grand total of $ n2^n + n 2^{n-1} – 2^n -2n+1$ , which is not correct. It looks like I’m off by a factor of $ n$ on the second term here. Where am I going wrong?

What are the permanent effects of a vampire bite if the character doesn’t die?

According to the Monster Manual entry for vampires, the Bite attack has the following effects, once successful:

Hit: 7 (1d6 + 4) piercing damage plus 10 (3d6) necrotic damage. The target’s hit point maximum is reduced by an amount equal to the necrotic damage taken, and the vampire regains hit points equal to that amount. The reduction lasts until the target finishes a long rest. The target dies if this effect reduces its hit point maximum to 0. A humanoid slain in this way and then buried in the ground rises the following night as a vampire spawn under the vampire’s control.

If the player character doesn’t die and is able to retreat (or defeat the vampire) and take a long rest, are there any long-term or permanent consequences of this bite? Besides the mental trauma, of course?

What happens to the target of a “permanent” True Polymorph spell, when its caster dies

The description of the spell says specifically that after the caster has maintained it’s concentration for an hour, the spell can be dispelled.

The transformation lasts for the duration, or until the target drops to 0 hit points or dies. If you concentrate on this spell for the full duration, the spell lasts until it is dispelled.

In another question it was specified that spells which can be dispelled, will last until its effect ends. While spells which requires concentration, will end upon death. However it does not specify what happens with a spell that initially requires concentration.

If the caster dies after this duration, what happens to the target?

  • Does the target retain its current form?
  • Does the target revert back to the previous form?

What permanent spells would I be able to cast to make demiplane into a true base? [closed]

The character is a lvl 20 hexblade warlock who has an 8th level spell as a mystic arcanum. The DM is very open to homebrew. That’s how this game was described.

If it’s not broken and if the spell is mostly flavor text, it doesn’t matter if it’s on the warlock spell list – I could probably use it. For context, the party wizard has cure wounds.

What spells would I cast together to make a really good base?