Are there any attacks or effects that reduce max HP to 0 without stating what happens?

Inspired by PJRZ’s comment on this answer to this question:

What attacks actually exist that reduce someone’s max HP, but do not specifically state what happens at max HP of 0?

As far as I am aware, all monster abilities that can reduce max HP to 0 state that the creature dies (and optionally may be brought back as some undead creature, depending on the exact creature/attack used to reduce the max HP to 0).

As an example of an attack that does state what happens, consider a Wraith’s Life Drain attack (MM, pg. 302):

Life Drain. Melee Weapon Attack: +6 to hit, reach 5 ft., one creature. Hit: 21 (4d8 + 3) necrotic damage. The target must succeed on a DC 14 Constitution saving throw or its hit point maximum is reduced by an amount equal to the damage taken. This reduction lasts until the target finishes a long rest. The target dies if this effect reduces its hit point maximum to 0.

Are there any attacks or effect that reduce a creature’s max HP to 0, but do not address whether or not the target dies?

How can a low level rouge reduce a targets constitution bonus

I want to play a rogue that relies heavily on poisons and other utility flasks (ie: alchemists fire). We’re starting out at level 1 and the story arc should take us to roughly level 11. To make poisons more reliable, how would you go about reducing a targets constitution so that there is a better chance that the target has a better chance at failing their saving roll?

In Battle? Out of Battle?

Identified Folder does not reduce in size over time

Hi @Sven

I am trying to figure out how to exhaust my identified folder to make it all verified (how to find more verified faster).

When I monitored over last 2 days, with a project that only uses Identified links, these are my folder sizes:

Day 0 
Identified 494mb
Submitted 549mb
Verified 829mb

Day 2
Identified 511mb
Submitted 572mb
Verified 857mb

My expectation would be the Identified folder reduces in size as  links are deleted from this folder when they are submitted/verified, however the Identified folder is increasing in size instead??

Am I missing something?

Can Magical Lineage reduce a spell’s level multiple times?

Oh wise brains of the internet, I implore thee

Magical Lineage states "Pick one spell when you choose this trait. When you apply metamagic feats to this spell that add at least 1 level to the spell, treat its actual level as 1 lower for determining the spell’s final adjusted level."

If applying multiple metamagic feats to a spell, such as Maximized + Empowered, would Magical Lineage reduce the total adjusted level by 2 (once for each application of a metamagic feat) or only once regardless of the number of metamagic feats?

My initial take is that it only applies once, regardless of the number of metamagic feats applied, but might as well double check and make sure it’s right.

I just want to know whether I should be preparing Maximized Empowered Battering Blast into a 7th level slot or a 6th level slot.

Thank you.

Writing a list of names, with a limited amount of “active” letters at a time. Algorithm to sort the names to reduce the amount of swapping letters?

While making name-tags for a dinner seating, I stumbled upon a problem which I can’t find any algorithm to solve, and I’m not sure where to begin.

The goal is to write the name of each dinner guest on a card, completing one name at a time. The names are written with old-fashioned rubber stamps, so only 6 letters can be "active" at any given time. When a new letter is required, one of the active letters has to be swapped out for the new letter.

The problem is to sort the names in such an order, that I need to do the least amount of letter-swapping.

Example
I want to write the names:

  • Jack
  • Julie
  • Chuck

I can do this with 3 letter-swaps
Initial letters: J A C K H U
Write: Jack, Chuck

{swap A, C, K with L, I, E}

New active letters: J L I E H U
Write: Julie

Now I want to find an algorithm that, given a list of names and a limit of active characters, provide the order of names and which letters to swap at each name, to reduce the total amount of letter-swaps.

Any ideas or pointers are welcome.

Would being blind reduce a character’s speed?

A PC is under the effect of a Suggest spell and told to follow someone who had darkvision. The PC, who is under the effect, doesn’t have darkvision, and they are led into a tunnel system that is pitch black. How fast are they able to move?

I can’t find anything RAW which states that trying to move in darkness has any detrimental effects, other than the obvious statement of not being able to actually see where they are going.

N-dimensional generalization of map and reduce?

Is there any conceptual generalization of higher-order functions like map and reduce but for N-dimensional objects (e.g. arrays or tensors)?

For mapping, I guess it would be a point-wise generalization. In the case of reduction, I have more doubts because the iteration is not trivial. Perhaps it would take an additional argument specifying the dimension (or dimensions?) along which the reduction is applied?

Are such higher-order functions defined in algebra? E.g. do they have a specific name and are studied as such?

Does reducing a character’s max HP with a spell also reduce the “negative HP” threshold needed to cause instant death?

Here’s my situation: In a fight with a group of vampire thralls, the party’s wizard got caught in a corner and was being savaged by vampire bites, his max HP dropping from 24 to 11. They fended off the vampires, but the wizard was at 3hp (He refused to be healed by the cleric due to his character’s hatred of religion and gods). He activated a trap collapsing the temple, and ended up getting hit by a falling chunk of stone ceiling, taking 15 damage (the rock rolled better than any of the vampires).

Now, the wizard is reduced to 0 hp, with 12 damage left over. The cleric’s player says that exceeds the wizard’s current max hp of 11, causing insta-death. The wizard’s player argues that the death threshold for negative HP isn’t affected by max-hp-reducing spells, claiming that would make those kinds of spells more powerful than intended.

I have stories planned in either case, but I’d rather be certain that I’m following the rules.

Is the threshold for instant death based on current max hp or normal max hp?