## What is the movement distance to the Ethereal Plane?

How much movement does it count as to go to the Ethereal Plane?

The genesis of this question is that a Glyph of Warding dissipates if it is moved more than 10 feet. My intent is to cast a Glyph of Warding on a Leomund’s Secret Chest. I need to know if the Glyph will remain active when I send the chest to the Ethereal Plane, and when I retrieve it later.

## What are the chances that authorities spy people’s devices?

I wanted to figure out whether authorities can potentially, not in terms of whether they are allowed to, spy people’s smartphones activities such as e-amail, whatsapp chats, and so on. I don’t mean the FBi or NSA techniques used to catch dangerous people or whoever is highly harmful to the society, but I mean whether simple police stuff could possibly spy, for example, small drug dealers phones in order to dismantle their plans and so forth.

## Player is out of character and refuses to play her character correctly [closed]

A player in my campaign (I am the DM) is going way out of control-by not playing her character.

Whenever I point this out, she says that it is something her character would do, but a look at her character sheet proves her wrong.

She also lies about her dice rolls.

On top of that, she has looked through the monster manual and points out monster stats in-game, along with other things.

She is a meta-gamer that has gone out of control. I don’t know what I want to do about this. One thing that happened was when we saw a magical object, nobody knew anything about it. In this world, her character does not know what it is. It was described as:

a bag that was very dark inside and when the npc told them it was a way to get rid of things forever.

She then immediately burst out with:

That is a bag of devouring. We can put things in it and they will be destroyed.

## Proving sets of regular expressions and context free grammars are decidable [duplicate]

• What is the complexity of deciding if the intersection of a regular language and a context free language is empty? 1 answer
• Intersection between regular language and context-free language [closed] 1 answer
• Proof Idea: How to prove the intersection of regular language and CFL is a CFL? 2 answers
• Is there a *simple* proof that the intersection of a CFL and a regular language is a CFL? 4 answers
• Intersection of context free with regular languages 1 answer

Consider below languages:

1. $$L_1=\{|M$$ is a regular expression which generates at least one string containing an odd number of 1’s$$\}$$
2. $$L_2=\{|G$$ is context free grammar which generates at least one string of all 1’s$$\}$$

Its given that both above languages are decidable, but no proof is given. I tried guessing. $$L_1$$ is decidable, its a set of regular expressions containing

• odd number of $$1$$‘s, or
• even number of $$1$$‘s and $$1^+$$ or
• $$1^*$$

So we just have to parse regular expression for these characteristics. Is this right way to prove $$L_1$$ is decidable?

However, can we have some algorithm to check whether given input CFG accepts at least one string of all 1’s? I am not able to come up with and hence not able prove how $$L_2$$ is decidable.

## What things are in the Essentials Kit but not the Player’s Handbook and Dungeon Master’s Guide?

The Essentials Kit was published on June 24th 2019 (available everywhere on September 3rd of the same year) and some of the rules in it are different from how they appear in the PHB (even post-errata). I’m wondering just how many of these there are and what they are as they may result in certain rules being overturned.

I’ve currently provided my own answer with the things that I have found, and welcome anybody to edit in other examples throughout the books. Note that I’m not looking for things that are missing from the Essentials Kit, but things that are only in the Essentials Kit.

## Permissions required for row counts to show up on Object Explorer Details

I’m having a weird security issue. I have a user that’s using SSMS 18.2 on a SQL 2016 server. They are a member of db_datareader but when they pull up the the Row Count column in Object Explorer Details it’s blank. As best I can tell it is requiring DBO in order to get the row counts to show up.

User with dbo access:

Is this a bug or intentional? Does anyone know if there is a lower level of permissions that will give this row count? I know there are plenty of other ways to get the row count, sys.partitions for example, however the user insists they want to use the OED window.

## Disk encryption with automatic reboot and no-network

I am using crytsetup with LUKS to encrypt a data drive, separate to the system drive, under Ubuntu 16.04. The issue I am facing is that this system will also be required to automatically start itself up in the event of power loss. The other constraint is that this system can not be connected to a network.

Essentially the only security risk with respect to the data is the case that someone physically steals the system with the HD on board. So of course I can provide an associated key to the drive but given that I have no network access, and yet I still require unattended rebooting, I’m a bit lost on how to proceed.

Looking for general thoughts on how to handle such a situation. Perhaps there are physical security solutions (i.e. self destructing USB -though who knows upon what condition given my requirements!) that might be helpful. Or really any comments from anyone who has faced the same constraint: i.e. encrypted drive with unattended reboot, and no network. Maybe I’m thinking about the problem the wrong way?

## Expanding crafting and adding recipes

A note for the start, I am a new DM with not so much experience.

My party is far from a bigger city and running low on healing potions. One of my players has proficiency with the herbalism kit and asked me if he could collect the ingredients and brew a healing potion.

I like the idea behind it. I have similar experiences from computer games. For example I played an MMORPG online for quite a while, where you could choose a profession and on your adventures collect ingredients for your profession. If you had the recipes for them you could then craft items from these. Recipes also had to be found or bought somewhere.

So I looked up the rules but they are quite bare on this. Xanathar’s Guide to Everything states that given a herbalism kit, a common healing potion takes one workday to brew and 25 gp (also mentioned in the answers to this RPG.SE question: How does one craft Potions of Healing?). Not sure what the player is supposed to do with the gold. I doubt it is meant as an ingredient. Also the tree next to him doesn’t seem too interested in being turned into herbs.

So I looked online and found some homebrew guides like here and here. They do include rules for collecting herbs and recipes for combining them.

However for all I know that could be untested theory. Apparently it is not commonly used in campaigns. Why is that so? I am looking for experience with this kind of crafting. Have you done something similar in your campaign and how did it go?

What other good sources on this topic are out there? Is there maybe something from previous editions of D&D that I did not find?

## Derandomization of vertex cover algorithm

I have the following randomized-algorithm for the vertex cover problem. Let $$B_0$$ be the output set:

Fix some order $$e_1, e_2,…,e_m$$ over all edges in the edge set E of G, and set $$B_0=∅$$.

Add to $$B_0$$ all isolated vertices, i.e. the ones without any incident edges.

For every edge $$e$$ in $$e_1,e_2,…,e_m$$ if both endpoints of e are not contained in $$B_0$$, then flip a fair coin deciding which of the endpoints to choose, and add this endpoint to $$B_0$$.

I have already proved that this algorithm has $$E[|B_0|] \le 2|OPT|$$.

Now I don’t know how to apply the method of conditional expectations (defined here) to derandomize the algorithm in order to show that we can’t obtain an efficient deterministic version and that gives the same result of the expected value found previously. Can you show me to do this?

## Dragon Heist – Spring : Vault Entrace

I’m preparing to run my table through the “Dragon Season” phase of Dragon Heist on Spring setting, but there’s one thing that looks like its going to be a big problem: the entrance to the vault.

First off, it seems almost impossible to find. All they know is that its somewhere

But this is a super big map, with something like 15 rooms, only one square of one of which actually contains the door. Additionally its a hidden door with an DC 20 Perception check to notice. Not passive perception, but perception. They have to be actively looking for it. This from a table that hasn’t looked for (or found) a secret door in this campaign yet.

It seems exceedingly unlikely they’d manage to make a check in the right spot, and even if they do, most likely they won’t find it because the DC is so crazy high.

But it gets worse. Say I rule that the stone tells them exactly what square to search (pretty sure I’m actually going to have to do this). Well opening it requires a knock spell (which they don’t have), or a DC 30 strength check. Even the barbarian can’t make that without a nat 20.

How are they supposed to get in? Has anyone else run Spring, and if so, how did your table get past this?